Honor Magic3 vs. Samsung Galaxy S21 Ultra 5G: Which Flagship Delivers More?

The Honor Magic3 and Samsung Galaxy S21 Ultra 5G represent distinct approaches to the premium smartphone market. The Magic3, powered by the Snapdragon 888, aimed to disrupt with aggressive pricing and fast charging. The S21 Ultra, with its Exynos 2100 (International) or Snapdragon 888 (US/China) variant, doubled down on Samsung’s established camera and display leadership. This comparison dissects their strengths and weaknesses to determine which phone offers the best experience.
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🏆 Quick Verdict

For most users, the Samsung Galaxy S21 Ultra 5G emerges as the more polished and versatile flagship. While the Honor Magic3 offers competitive performance and blazing-fast 66W charging, the S21 Ultra’s superior display, more refined camera system, and broader software support justify its higher price for those prioritizing a premium experience.

PHONES
Phone Names Honor Magic3 Samsung Galaxy S21 Ultra 5G
Network
2G bandsGSM 850 / 900 / 1800 / 1900GSM 850 / 900 / 1800 / 1900
3G bandsHSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28, 34, 38, 39, 40, 411, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 30, 38, 39, 40, 41, 46, 48, 66, 71 - SM-G998U1
5G bands1, 3, 5, 8, 28, 38, 41, 77, 78, 79 SA/NSA2, 5, 25, 41, 66, 71, 260, 261 SA/NSA/Sub6/mmWave - SM-G998U1
SpeedHSPA, LTE, 5GHSPA 42.2/5.76 Mbps, LTE (7CA) Cat20 2000/200 Mbps, 5G (5+ Gbps DL)
TechnologyGSM / CDMA / HSPA / EVDO / LTE / 5GGSM / CDMA / HSPA / EVDO / LTE / 5G
 CDMA2000 1xEV-DO 1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 66, 77, 78 SA/NSA/Sub6 - SM-G998B
Launch
Announced2021, August 122021, January 14
StatusAvailable. Released 2021, August 20Available. Released 2021, January 29
Body
BuildGlass front, glass back or vegan leather back, aluminum frameGlass front (Gorilla Glass Victus), glass back (Gorilla Glass Victus), aluminum frame
Dimensions162.8 x 74.9 x 8.99 mm (Glass) / 9.5 mm (Vegan Leather)165.1 x 75.6 x 8.9 mm (6.5 x 2.98 x 0.35 in)
SIMNano-SIM + Nano-SIM· Nano-SIM + eSIM· Nano-SIM + Nano-SIM + eSIM (max 2 at a time)
Weight203 g (Glass) / 202 g (Vegan Leather) (7.16 oz)227 g (Sub6), 229 g (mmWave) (8.01 oz)
 IP54, dust and water resistantIP68 dust/water resistant (up to 1.5m for 30 min) Stylus support
Display
Protection-Corning Gorilla Glass Victus
Resolution1344 x 2772 pixels, 18.5:9 ratio (~456 ppi density)1440 x 3200 pixels, 20:9 ratio (~515 ppi density)
Size6.76 inches, 115.7 cm2 (~94.9% screen-to-body ratio)6.8 inches, 112.1 cm2 (~89.8% screen-to-body ratio)
TypeOLED, 1B colors, 120Hz, HDR10+Dynamic AMOLED 2X, 120Hz, HDR10+, 1500 nits (peak)
 -Always-on display
Platform
CPUOcta-core (1x2.84 GHz Cortex-X1 & 3x2.42 GHz Cortex-A78 & 4x1.80 GHz Cortex-A55Octa-core (1x2.9 GHz Cortex-X1 & 3x2.80 GHz Cortex-A78 & 4x2.2 GHz Cortex-A55) - InternationalOcta-core (1x2.84 GHz Cortex-X1 & 3x2.42 GHz Cortex-A78 & 4x1.80 GHz Cortex-A55) - USA/China
ChipsetQualcomm SM8350 Snapdragon 888 5G (5 nm)Exynos 2100 (5 nm) - InternationalQualcomm SM8350 Snapdragon 888 5G (5 nm) - USA/China
GPUAdreno 660Mali-G78 MP14 - InternationalAdreno 660 - USA/China
OSAndroid 11, Magic UI 5Android 11, up to 4 major Android upgrades, One UI 6.1
Memory
Card slotNoNo
Internal128GB 8GB RAM, 256GB 8GB RAM128GB 8GB RAM, 128GB 12GB RAM, 256GB 12GB RAM, 256GB 16GB RAM, 512GB 12GB RAM, 512GB 16GB RAM
 -UFS 3.1
Main Camera
FeaturesLED flash, HDR, panoramaLaser AF, LED flash, auto-HDR, panorama
Quad-108 MP, f/1.8, 24mm (wide), 1/1.33", 0.8µm, PDAF, OIS 10 MP, f/2.4, 72mm (telephoto), 1/3.24", 1.22µm, dual pixel PDAF, OIS, 3x optical zoom 10 MP, f/4.9, 240mm (periscope telephoto), 1/3.24", 1.22µm, dual pixel PDAF, OIS, 10x optical zoom 12 MP, f/2.2, 13mm (ultrawide), 1/2.55", 1.4µm, dual pixel PDAF, Super Steady video
Single13 MP, f/2.4, 100˚ (ultrawide)-
Triple50 MP, f/1.9, 23mm (wide), 1/1.56", 1.0µm, multi-directional PDAF 64 MP, f/1.8, (monochrome) 13 MP, f/2.2, 120˚ (ultrawide)-
Video4K@30/60fps, 1080p@30/60fps, gyro-EIS8K@24fps, 4K@30/60fps, 1080p@30/60/120/240fps, HDR10+, stereo sound rec., gyro-EIS
Selfie camera
FeaturesHDRHDR
Single13 MP, f/2.4, 100˚ (ultrawide)40 MP, f/2.2, 26mm (wide), 1/2.8", 0.7µm, PDAF
Video1080p@30fps4K@30/60fps, 1080p@30fps
Sound
3.5mm jack NoNo
35mm jackNoNo
Loudspeaker Yes, with stereo speakersYes, with stereo speakers
 -32-bit/384kHz audio Tuned by AKG
Comms
Bluetooth5.2, A2DP, LE, aptX HD5.2, A2DP, LE
NFCYesYes
PositioningGPS (L1+L5), GLONASS (L1), BDS (B1I+B1c+B2a)GPS, GLONASS, BDS, GALILEO
RadioNoFM radio (Snapdragon model only; market/operator dependent)
USBUSB Type-C 3.1, OTGUSB Type-C 3.2, OTG
WLANWi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi DirectWi-Fi 802.11 a/b/g/n/ac/6e, dual-band, Wi-Fi Direct
Features
SensorsFingerprint (under display, optical), accelerometer, gyro, proximity, compassFingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compass, barometer
 -Samsung DeX, Samsung Wireless DeX (desktop experience support) Bixby natural language commands and dictation Samsung Pay (Visa, MasterCard certified) Ultra Wideband (UWB) support
Battery
Charging66W wired 5W reverse wired25W wired, PD3.0 15W wireless (Qi) 4.5W reverse wireless
TypeLi-Po 4600 mAhLi-Ion 5000 mAh
Misc
ColorsGolden Hour (Vegan Leather), Blue Hour (Vegan Leather), Black, WhitePhantom Black, Phantom Silver, Phantom Titanium, Phantom Navy, Phantom Brown, Navy
ModelsELZ-AN00SM-G998B, SM-G998B/DS, SM-G998U, SM-G998U1, SM-G998W, SM-G998N, SM-G9980
PriceAbout 670 EUR$ 240.01 / C$ 353.20 / £ 202.99 / € 264.99
SAR-0.77 W/kg (head)     1.02 W/kg (body)
SAR EU-0.71 W/kg (head)     1.58 W/kg (body)
Pricing
128GB 12GB RAM-$ 384.99
256GB 12GB RAM-$ 998.00
512GB 12GB RAM-$ 1,179.99
RENEWED-$ 459.00
Tests
Battery life- Endurance rating 114h
Camera- Photo / Video
Display- Contrast ratio: Infinite (nominal)
Loudspeaker- -25.5 LUFS (Very good)
Performance- AnTuTu: 657150 (v8) GeekBench: 3518 (v5.1) GFXBench: 33fps (ES 3.1 onscreen)

Honor Magic3

  • Blazing-fast 66W wired charging
  • Competitive Snapdragon 888 performance
  • Potentially more affordable price point

  • Less established brand reputation
  • Limited software support compared to Samsung
  • Display specifications are less impressive

Samsung Galaxy S21 Ultra 5G

  • Superior display brightness and quality
  • More versatile and refined camera system
  • Longer software support lifecycle

  • Slower 25W wired charging
  • Exynos variant may experience thermal throttling
  • Higher price tag

Display Comparison

The Samsung Galaxy S21 Ultra boasts a significantly brighter display, reaching a measured 1023 nits, compared to an unspecified peak brightness for the Honor Magic3. While both likely utilize OLED technology, the S21 Ultra’s ‘Infinite’ contrast ratio suggests a more sophisticated panel. The S21 Ultra’s larger size and higher resolution contribute to a more immersive viewing experience. The Honor Magic3’s display specs are less detailed, making a direct comparison challenging, but Samsung’s display technology is generally considered industry-leading.

Camera Comparison

Both devices are equipped with advanced camera systems, but the S21 Ultra’s specifications suggest a more comprehensive offering. While both are listed as having 'Photo / Video' capabilities, the S21 Ultra’s larger sensors and more sophisticated image processing algorithms likely deliver superior image quality, particularly in low-light conditions. The S21 Ultra’s multi-camera array offers greater versatility, including advanced zoom capabilities. The Honor Magic3’s camera details are less specific, making a detailed comparison difficult, but Samsung’s camera reputation is well-established.

Performance

Both phones utilize the Qualcomm Snapdragon 888 5G (5nm) in some regions, but the Galaxy S21 Ultra also features the Exynos 2100 (5nm) in international markets. The S21 Ultra’s CPU configuration (2.9 GHz Cortex-X1 vs 2.84 GHz on the Magic3 and USA/China S21 Ultra) offers a slight clock speed advantage, potentially translating to marginally faster single-core performance. However, the Exynos 2100 has historically faced thermal throttling concerns, potentially negating this advantage under sustained load. Both devices feature ample RAM (12GB in comparable configurations), ensuring smooth multitasking. The Honor Magic3’s thermal management performance relative to the S21 Ultra’s Exynos variant remains a key question.

Battery Life

The Samsung Galaxy S21 Ultra achieves an impressive endurance rating of 114 hours, indicating excellent battery life. While the Honor Magic3’s battery capacity is not specified, its 66W wired charging significantly outperforms the S21 Ultra’s 25W charging. This means the Magic3 can replenish its battery much faster, potentially mitigating any capacity disadvantage. The S21 Ultra also supports 15W wireless charging and 4.5W reverse wireless charging, features the Magic3 matches with 5W reverse wired charging, but lacks wireless charging.

Buying Guide

Buy the Honor Magic3 if you prioritize charging speed and are comfortable with a less established software ecosystem. Its 66W wired charging is a significant advantage for power users. Buy the Samsung Galaxy S21 Ultra 5G if you value a best-in-class display, a more versatile camera system with extensive features, and a longer software support lifecycle. It’s the safer bet for those seeking a complete premium experience.

Frequently Asked Questions

❓ Does the Exynos 2100 chip in the Galaxy S21 Ultra overheat during prolonged gaming sessions?
The Exynos 2100 variant of the Galaxy S21 Ultra has been reported to experience thermal throttling under sustained heavy load, such as extended gaming. This can lead to reduced performance to prevent overheating. The Snapdragon 888 variant generally performs better in this regard, but both chips can get warm during intensive tasks.
❓ How long does it take to fully charge the Honor Magic3 with its 66W charger?
Honor claims the Magic3 can charge from 0% to 100% in approximately 30-35 minutes using its 66W SuperCharge technology. This is significantly faster than the Samsung Galaxy S21 Ultra’s 25W charging, which typically takes over an hour.
❓ Is the 2MP macro camera on either phone actually useful for taking detailed close-up shots?
Generally, 2MP macro cameras on flagship phones are more of a marketing feature than a genuinely useful tool. The low resolution often results in soft, lacking detail images. While they can capture a close-up perspective, the image quality is rarely impressive compared to using the main camera with digital zoom.
❓ Does the Samsung Galaxy S21 Ultra support 90fps or 120fps gameplay in demanding titles like PUBG Mobile?
The Samsung Galaxy S21 Ultra can achieve 90fps in PUBG Mobile with the highest graphics settings enabled, but maintaining a stable framerate depends on the specific device configuration and thermal conditions. 120fps is not officially supported in PUBG Mobile, even on the S21 Ultra.