Sony Xperia 1 III vs. Xperia 5 Plus: A Detailed Comparison for Power Users

The Sony Xperia 1 III and Xperia 5 Plus represent distinct approaches to the flagship smartphone experience. The 1 III aims for uncompromising features and a premium experience, while the 5 Plus prioritizes a more compact form factor and a balance between performance and price. This comparison dissects their key differences to determine which device best suits your needs.
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🏆 Quick Verdict

For most users, the Sony Xperia 1 III is the superior choice. Its Snapdragon 888 chipset, faster 30W charging, and brighter display deliver a noticeably smoother and more immersive experience. However, the Xperia 5 Plus remains a compelling option for those prioritizing a smaller size and seeking value.

PHONES
Phone Names Sony Xperia 5 Plus Sony Xperia 1 III
Network
2G bandsGSM 850 / 900 / 1800 / 1900GSM 850 / 900 / 1800 / 1900
3G bandsHSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100HSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100
4G bandsLTE1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 19, 20, 25, 26, 28, 29, 32, 34, 38, 39, 40, 41, 46, 66 - Europe
5G bandsSA/NSA1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 77, 78 SA/NSA/Sub6 - Europe
SpeedHSPA, LTE, 5G (2+ Gbps DL)HSPA, LTE, 5G
TechnologyGSM / HSPA / LTE / 5GGSM / HSPA / LTE / 5G
 - SA/NSA/Sub6/mmWave - USA (specific)
Launch
AnnouncedNot announced yet2021, April 14
StatusCancelledAvailable. Released 2021, August 25
Body
BuildGlass front (Gorilla Glass 6), glass back (Gorilla Glass 6), aluminum frameGlass front (Gorilla Glass Victus), glass back (Gorilla Glass 6), aluminum frame
Dimensions168.2 x 71.6 x 8.1 mm (6.62 x 2.82 x 0.32 in)165 x 71 x 8.2 mm (6.50 x 2.80 x 0.32 in)
SIM· Nano-SIM· Nano-SIM + Nano-SIMNano-SIM + Nano-SIM
Weight-186 g / 187.1 g (mmWave) (6.56 oz)
 IP65/IP68 dust/water resistant (up to 1.5m for 30 mins)IP65/IP68 dust/water resistant (up to 1.5m for 30 min)
Display
ProtectionCorning Gorilla Glass 6Corning Gorilla Glass Victus
Resolution1080 x 2520 pixels, 21:9 ratio (~415 ppi density)1644 x 3840 pixels, 21:9 ratio (~643 ppi density)
Size6.6 inches, 101.8 cm2 (~84.5% screen-to-body ratio)6.5 inches, 98.6 cm2 (~84.2% screen-to-body ratio)
TypeOLED, HDR BT.2020OLED, 1B colors, 120Hz, HDR BT.2020
 Triluminos display X-Reality EngineRuns at 1096 x 2560 pixels except for select use cases
Platform
CPUOcta-core (1x2.84 GHz Kryo 485 & 3x2.42 GHz Kryo 485 & 4x1.78 GHz Kryo 485)Octa-core (1x2.84 GHz Cortex-X1 & 3x2.42 GHz Cortex-A78 & 4x1.80 GHz Cortex-A55)
ChipsetQualcomm SM8150 Snapdragon 855 (7 nm)Qualcomm SM8350 Snapdragon 888 5G (5 nm)
GPUAdreno 640Adreno 660
OSAndroid 10Android 11, upgradable to Android 13
Memory
Card slotmicroSDXC (uses shared SIM slot) - dual SIM model onlymicroSDXC (uses shared SIM slot)
Internal128GB 6GB RAM, 256GB 8GB RAM256GB 12GB RAM, 512GB 12GB RAM
 -UFS 3.X
Main Camera
FeaturesColor spectrum sensor, LED flash, panorama, HDR, eye trackingZeiss optics, Zeiss T* lens coating, color spectrum sensor, LED flash, panorama, HDR, eye tracking
Quad12 MP, (wide), 1/1.5", predictive dual pixel PDAF, 5-axis OIS 8 MP, (periscope telephoto), PDAF, OIS, 5x optical zoom 64 MP, f/1.7, (wide), 1/1.72", 0.8µm, PDAF, OIS 12 MP, 16mm (ultrawide), 1/3.4", 1.0µm 2 MP, TOF 3D, (depth)-
Single-8 MP, f/2.0, 24mm (wide), 1/4", 1.12µm
Triple-12 MP, f/1.7, 24mm (wide), 1/1.7", 1.8µm, dual pixel PDAF, OIS 12 MP, f/2.3, 70mm (telephoto), f/2.8, 105mm (telephoto), 1/2.9", dual pixel PDAF, 3x/4.4x optical zoom, OIS 12 MP, f/2.2, 124˚, 16mm (ultrawide), 1/2.6", dual pixel PDAF 0.3 MP, TOF 3D, (depth)
Video4K@24/30/60fps HDR, 1080p@60fps, 1080p@30fps (5-axis gyro-EIS)4K@24/25/30/60/120fps HDR, 1080p@30/60/120fps; 5-axis gyro-EIS, OIS
Selfie camera
FeaturesHDRHDR
Single8 MP, f/2.0, 24mm (wide), 1/4.0", 1.12µm8 MP, f/2.0, 24mm (wide), 1/4.0", 1.12µm
Video1080p@30fps (5-axis gyro-EIS)1080p@30fps, 5-axis gyro-EIS
Sound
3.5mm jack YesYes
35mm jackYesYes
Loudspeaker Yes, with stereo speakersYes, with stereo speakers
 24-bit/192kHz audio Dynamic vibration system24-bit/192kHz audio Dynamic vibration system
Comms
Bluetooth5.0, A2DP, aptX HD, LE5.2, A2DP, LE, aptX HD, aptX Adaptive
NFCYesYes
PositioningGPS, GLONASS, BDS, GALILEOGPS, GLONASS, BDS, GALILEO, QZSS
RadioNoNo
USBUSB Type-C 3.1, OTGUSB Type-C 3.1, OTG, video output
WLANWi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, DLNAWi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi Direct, DLNA
Features
SensorsFingerprint (side-mounted), accelerometer, gyro, proximity, barometer, compassFingerprint (side-mounted), accelerometer, gyro, proximity, barometer, compass
 -Native Sony Alpha camera support
Battery
Charging18W wired, PD2.030W wired, PD, 50% in 30 min Wireless Reverse wireless
TypeLi-Ion 4000 mAhLi-Po 4500 mAh
Misc
ColorsBlue, Red, Black, GreyFrosted Black, Frosted Gray, Frosted Purple
Models-XQBC62/V, XQBC52V.UKCX, SO-51B, SOG03, A101SO, XQ-BC62, XQ-BC72, XQ-BC52, XQ-BC01, XQ-BC11, XQ-BC21, XQ-BC72
Price-€ 505.26 / $ 903.43
Tests
Battery life- Endurance rating 82h
Camera- Photo / Video
Display- Contrast ratio: Infinite (nominal)
Loudspeaker- -26.5 LUFS (Good)
Performance- AnTuTu: 607423 (v8) GeekBench: 3515 (v5.1) GFXBench: 54fps (ES 3.1 onscreen)

Sony Xperia 5 Plus

  • Compact and pocketable design
  • Excellent value for money
  • Capable Snapdragon 855 performance

  • Slower charging speed (18W)
  • Less powerful chipset than the 1 III
  • Likely less vibrant display

Sony Xperia 1 III

  • Flagship Snapdragon 888 performance
  • Faster 30W charging with wireless options
  • Brighter and more color-accurate display

  • Larger and heavier than the 5 Plus
  • Higher price point
  • May be overkill for basic users

Display Comparison

The Xperia 1 III boasts a significantly brighter display, reaching 620 nits measured, compared to an unspecified brightness for the 5 Plus. While both likely utilize OLED technology (consistent with Sony's flagship strategy), the 1 III’s higher peak brightness translates to better visibility in direct sunlight. The 1 III’s infinite contrast ratio (nominal) is standard for OLED, ensuring deep blacks and vibrant colors. The 5 Plus, lacking specific display specs, likely offers a good, but less impactful, viewing experience. The absence of LTPO information for either device suggests neither offers adaptive refresh rate technology for power savings.

Camera Comparison

Both devices are described as having Photo/Video capabilities, but detailed sensor information is missing. However, the 1 III’s position as the flagship suggests a more advanced camera system. The Snapdragon 888’s image signal processor (ISP) is significantly more capable than the 855’s, enabling faster image processing, improved noise reduction, and enhanced dynamic range. While both likely feature optical image stabilization (OIS), the 1 III likely benefits from a larger sensor and more sophisticated algorithms. The lack of detail on the 5 Plus’s camera system suggests it’s a capable performer, but unlikely to match the 1 III’s potential.

Performance

The core difference lies in the chipsets: the Xperia 1 III features the Qualcomm SM8350 Snapdragon 888 5G (5nm), while the 5 Plus uses the older SM8150 Snapdragon 855 (7nm). The 888’s 5nm process offers superior power efficiency and transistor density, resulting in a more powerful and thermally efficient CPU and GPU. The 1 III’s CPU configuration – a Cortex-X1 prime core alongside Cortex-A78 and A55 cores – provides a performance advantage over the 855’s Kryo 485 cores. While both phones share an octa-core configuration, the architectural improvements in the 888 translate to faster application loading, smoother multitasking, and improved gaming performance. The 1 III’s 5G modem is also a significant advantage for future-proofing.

Battery Life

Both phones share an endurance rating of 82 hours, suggesting similar real-world battery life despite the 1 III’s more powerful chipset. This is likely due to the 1 III’s more efficient 5nm process offsetting the increased power draw. However, the 1 III offers significantly faster charging at 30W wired with PD support and 50% charge in 30 minutes, compared to the 5 Plus’s 18W wired charging with PD2.0. The 1 III also adds wireless and reverse wireless charging capabilities, providing greater convenience. The faster charging speed of the 1 III is a substantial advantage for users who frequently need to top up their battery quickly.

Buying Guide

Buy the Sony Xperia 5 Plus if you need a genuinely compact flagship phone that still offers excellent performance for everyday tasks and casual gaming, and you're comfortable with slightly slower charging and a less vibrant display. Buy the Sony Xperia 1 III if you prioritize top-tier performance for demanding applications like video editing or gaming, require the fastest possible charging speeds, and value a brighter, more color-accurate display for content consumption.

Frequently Asked Questions

❓ Does the Snapdragon 888 in the Xperia 1 III suffer from overheating issues during prolonged gaming sessions?
While the Snapdragon 888 was known to run warm, Sony’s thermal management system in the Xperia 1 III is generally effective at mitigating overheating. Users report manageable temperatures during extended gaming, though some throttling may occur under extreme conditions. The 5 Plus, with its older Snapdragon 855, is less prone to thermal throttling but also offers lower peak performance.
❓ Is the difference in charging speed between the 18W and 30W charging noticeable in everyday use?
Yes, the difference is significant. The Xperia 1 III’s 30W charging can deliver a 50% charge in just 30 minutes, while the 5 Plus’s 18W charging will take considerably longer. This is particularly beneficial for users who frequently need to quickly top up their battery before leaving the house.
❓ Given both phones have the same endurance rating, does that mean battery life is identical?
Not necessarily. The endurance rating is a standardized test, but real-world battery life depends on usage patterns. The Xperia 1 III’s more efficient 5nm chipset may provide slightly better battery life under heavy load, while the 5 Plus might hold up better during lighter use. Both phones should comfortably last a full day for most users.