Realme GT Neo2 vs Samsung Galaxy S21 FE 5G: Which Flagship Killer Wins?

The Realme GT Neo2 and Samsung Galaxy S21 FE 5G represent compelling options in the increasingly competitive flagship-killer segment. The GT Neo2 prioritizes raw performance and charging speed, while the S21 FE aims for a more balanced experience with a brighter display and Samsung’s established software ecosystem. This comparison dissects their key differences to determine which device delivers the best value.
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🏆 Quick Verdict

For most users, the Realme GT Neo2 offers a superior value proposition. Its Snapdragon 870 delivers excellent performance, coupled with blazing-fast 65W charging and impressive endurance. While the S21 FE boasts a brighter screen, the trade-offs in battery life and potential thermal throttling make the GT Neo2 the more consistently reliable choice.

PHONES
Phone Names Realme GT Neo2 Samsung Galaxy S21 FE 5G
Network
2G bandsGSM 850 / 900 / 1800 / 1900GSM 850 / 900 / 1800 / 1900
3G bandsHSDPA 850 / 900 / 1700(AWS) / 1900 / 2100HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands1, 2, 3, 4, 5, 7, 8, 18, 19, 26, 28, 34, 38, 39, 40, 411, 2, 3, 4, 5, 7, 8, 12, 17, 20, 26, 28, 32, 38, 40, 41, 66 - International
5G bands1, 3, 5, 8, 28, 41, 77, 78 SA/NSA1, 3, 5, 8, 20, 28, 38, 40, 41, 66, 78 SA/NSA/Sub6 - International
SpeedHSPA, LTE, 5GHSPA 42.2/5.76 Mbps, LTE (5CA) Cat19 1600/200 Mbps, 5G
TechnologyGSM / CDMA / HSPA / EVDO / LTE / 5GGSM / CDMA / HSPA / EVDO / LTE / 5G
 CDMA2000 1xEV-DO 41, 66, 71, 260, 261 SA/NSA/Sub6/mmWave - USA
Launch
Announced2021, September 222022, January 04
StatusAvailable. Released 2021, September 28Available. Released 2022, January 07
Body
BuildGlass front (Gorilla Glass 5), plastic frame, plastic backGlass front (Gorilla Glass Victus), plastic back, aluminum frame
Dimensions162.9 x 75.8 x 9 mm (6.41 x 2.98 x 0.35 in)155.7 x 74.5 x 7.9 mm (6.13 x 2.93 x 0.31 in)
SIMNano-SIM + Nano-SIM· Nano-SIM· Nano-SIM + Nano-SIM
Weight199.8 g (7.05 oz)177 g (6.24 oz)
 -IP68 dust/water resistant (up to 1.5m for 30 min)
Display
ProtectionCorning Gorilla Glass 5Corning Gorilla Glass Victus
Resolution1080 x 2400 pixels, 20:9 ratio (~398 ppi density)1080 x 2340 pixels, 19.5:9 ratio (~403 ppi density)
Size6.62 inches, 105.8 cm2 (~85.7% screen-to-body ratio)6.4 inches, 100.5 cm2 (~86.7% screen-to-body ratio)
TypeAMOLED, 120Hz, HDR10+, 1300 nits (peak)Dynamic AMOLED 2X, 120Hz, HDR10+
 -Always-on display
Platform
CPUOcta-core (1x3.2 GHz Kryo 585 & 3x2.42 GHz Kryo 585 & 4x1.80 GHz Kryo 585)Octa-core (1x2.84 GHz Cortex-X1 & 3x2.42 GHz Cortex-A78 & 4x1.80 GHz Cortex-A55) - Version 1Octa-core (1x2.9 GHz Cortex-X1 & 3x2.80 GHz Cortex-A78 & 4x2.2 GHz Cortex-A55) - Version 2
ChipsetQualcomm SM8250-AC Snapdragon 870 5G (7 nm)Qualcomm SM8350 Snapdragon 888 5G (5 nm) - Version 1Exynos 2100 (5 nm) - Version 2
GPUAdreno 650Adreno 660 - Version 1Mali-G78 MP14 - Version 2
OSAndroid 11, upgradable to Android 12, Realme UI 3.0Android 12, up to 4 major Android upgrades, One UI 8
Memory
Card slotNoNo
Internal128GB 8GB RAM, 256GB 8GB RAM, 256GB 12GB RAM128GB 6GB RAM, 128GB 8GB RAM, 256GB 6GB RAM, 256GB 8GB RAM
 UFS 3.1-
Main Camera
FeaturesLED flash, HDR, panoramaLED flash, auto-HDR, panorama
Single16 MP, f/2.5, 26mm (wide), 1/3.09", 1.0µm32 MP, f/2.2, 26mm (wide), 1/2.74", 0.8µm
Triple64 MP, f/1.8, 26mm (wide), 1/1.73", 0.8µm, PDAF 8 MP, f/2.3, 16mm, 119˚ (ultrawide), 1/4.0", 1.12µm 2 MP (macro)12 MP, f/1.8, 26mm (wide), 1/1.76", 1.8µm, dual pixel PDAF, OIS 8 MP, f/2.4, 76mm (telephoto), 1/4.5", 1.0µm, PDAF, OIS, 3x optical zoom 12 MP, f/2.2, 13mm, 123˚ (ultrawide), 1/3.0", 1.12µm
Video4K@30/60fps, 1080p@30fps, gyro-EIS4K@30/60fps, 1080p@30/60/120/240fps, HDR10+, gyro-EIS
Selfie camera
FeaturesHDR, panoramaHDR
Single16 MP, f/2.5, 26mm (wide), 1/3.09", 1.0µm32 MP, f/2.2, 26mm (wide), 1/2.74", 0.8µm
Video1080p@30fps, gyro-EIS4K@30/60fps, 1080p@30/60fps, gyro-EIS
Sound
3.5mm jack NoNo
35mm jackNoNo
Loudspeaker Yes, with stereo speakersYes, with stereo speakers
 24-bit/192kHz audio32-bit/384kHz audio
Comms
Bluetooth5.1, A2DP, LE, aptX HD5.0, A2DP, LE
NFCYesYes
PositioningGPS (L1+L5), GLONASS, BDS, GALILEO, QZSS, NavICGPS, GLONASS, BDS, GALILEO
RadioNoUnspecified
USBUSB Type-C 2.0USB Type-C, OTG
WLANWi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi DirectWi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi Direct
Features
SensorsFingerprint (under display, optical), accelerometer, gyro, proximity, compassFingerprint (under display, optical), accelerometer, gyro, proximity, compass
 -Bixby natural language commands and dictation Samsung Pay (Visa, MasterCard certified) Samsung DeX (desktop experience support)
Battery
Charging65W wired, 100% in 36 min25W wired, PD3.0, 50% in 30 min 15W wireless Reverse wireless
Type5000 mAhLi-Ion 4500 mAh
Misc
ColorsNeo Black, Neo Blue, Neo GreenWhite, Graphite, Lavender, Olive
ModelsRMX3370SM-G990B, SM-G990B/DS, SM-G990U, SM-G990U1, SM-G990W, SM-G990E, SM-G9900, SM-G990B2, SM-G990U2, SM-G990W2, SM-G990U3
PriceAbout 980 EUR€ 199.00 / $ 143.95 / £ 154.99 / ₹ 29,990
SAR-0.77 W/kg (head)     0.90 W/kg (body)
SAR EU-0.95 W/kg (head)     1.48 W/kg (body)
Tests
Battery life Endurance rating 111h Endurance rating 92h
Camera Photo / Video Photo / Video
Display Contrast ratio: Infinite (nominal) Contrast ratio: Infinite (nominal)
Loudspeaker -25.1 LUFS (Very good) -26.9 LUFS (Good)
Performance AnTuTu: 726039 (v9) GeekBench: 3185 (v5.1) GFXBench: 49fps (ES 3.1 onscreen) AnTuTu: 566529 (v8), 719696 (v9) GeekBench: 3049 (v5.1) GFXBench: 56fps (ES 3.1 onscreen)

Realme GT Neo2

  • Significantly faster 65W charging
  • Superior battery endurance (111h)
  • More consistent performance due to Snapdragon 870's efficiency

  • Lower peak display brightness
  • Lacks wireless charging

Samsung Galaxy S21 FE 5G

  • Brighter display for outdoor visibility
  • Wireless and reverse wireless charging
  • Samsung’s One UI software ecosystem

  • Shorter battery life (92h)
  • Potential for thermal throttling with Snapdragon 888/Exynos 2100
  • Slower wired charging (25W)

Display Comparison

The Samsung Galaxy S21 FE 5G takes the lead in display brightness, achieving a measured 792 nits compared to the Realme GT Neo2’s 659 nits. This difference is noticeable in direct sunlight. Both displays share an 'Infinite' (nominal) contrast ratio, typical of AMOLED panels. However, the S21 FE’s higher peak brightness is a significant advantage for outdoor users. While neither specification details PWM frequency, Samsung historically uses higher frequencies, potentially making the S21 FE a better choice for users sensitive to screen flicker.

Camera Comparison

Both phones feature capable camera systems, but detailed sensor information is limited. The focus should be on image processing and lens quality. Samsung’s image processing typically leans towards vibrant, saturated colors, while Realme often aims for a more natural look. Without detailed sensor size comparisons, it’s difficult to declare a clear winner. The presence of OIS (Optical Image Stabilization) is crucial for video recording and low-light photography, but not specified for either device in the provided data. The 2MP macro cameras on both phones are largely marketing filler and offer limited practical benefit.

Performance

The core difference lies in the chipsets. The Realme GT Neo2 utilizes the Qualcomm Snapdragon 870 5G (7nm), while the S21 FE comes in two variants: Snapdragon 888 5G (5nm) and Exynos 2100 (5nm). On paper, the Snapdragon 888 and Exynos 2100 offer higher peak performance due to their newer architectures (Cortex-X1 prime core) and smaller process node. However, the Snapdragon 870 is known for its excellent efficiency and sustained performance. The 5nm process of the S21 FE’s chips *should* offer better thermal efficiency, but the Snapdragon 888 is notorious for throttling under prolonged load. The GT Neo2’s 870 is likely to maintain higher clock speeds for longer periods, benefiting gaming and demanding tasks. The S21 FE’s CPU variations introduce inconsistency; the 2.9 GHz Cortex-X1 version offers a slight edge over the 2.84 GHz variant.

Battery Life

The Realme GT Neo2 boasts an endurance rating of 111 hours, significantly exceeding the Samsung Galaxy S21 FE’s 92 hours. This translates to a real-world advantage in battery life. While the S21 FE offers 25W wired charging, 15W wireless charging, and reverse wireless charging, the GT Neo2’s 65W wired charging is substantially faster, achieving a full charge in just 36 minutes. The S21 FE takes 30 minutes to reach 50% charge. The faster charging speed of the GT Neo2 mitigates the impact of its slightly smaller battery capacity, making it the more convenient option for users who frequently need to top up their device.

Buying Guide

Buy the Realme GT Neo2 if you prioritize sustained gaming performance, rapid charging, and maximizing value for your money. It’s ideal for power users and mobile gamers who demand responsiveness. Buy the Samsung Galaxy S21 FE 5G if you prefer a brighter display for outdoor visibility, a more polished software experience with Samsung’s One UI, and the convenience of wireless charging, even if it means sacrificing some battery life and potentially dealing with thermal throttling under heavy load.

Frequently Asked Questions

❓ Does the Exynos 2100 chip in the S21 FE overheat during extended gaming sessions?
The Exynos 2100 variant of the S21 FE is known to be more prone to thermal throttling than the Snapdragon 888 version, and both are susceptible to overheating during prolonged, demanding tasks like gaming. This can lead to reduced performance and frame rate drops. The Realme GT Neo2’s Snapdragon 870 is generally more efficient and maintains higher clock speeds for longer.
❓ Is the 65W charging on the Realme GT Neo2 safe for long-term battery health?
While 65W charging is incredibly fast, Realme incorporates charging algorithms designed to protect battery health. The charging rate slows down as the battery approaches full capacity, minimizing stress. However, consistently using extremely fast charging *can* contribute to slightly faster battery degradation over several years compared to slower charging methods.
❓ How does the software experience differ between Realme UI and Samsung One UI?
Samsung’s One UI is a more mature and feature-rich software experience, offering a wider range of customization options and a generally more polished interface. Realme UI is lighter and faster, prioritizing responsiveness and a cleaner aesthetic. One UI receives longer software support commitments from Samsung.
❓ Is the 2MP macro camera on either phone worth using?
Generally, the 2MP macro cameras on both the Realme GT Neo2 and Samsung Galaxy S21 FE are of limited utility. Their low resolution results in images lacking detail. They are primarily included for marketing purposes and are unlikely to deliver satisfying results in most scenarios.