OnePlus 7T vs Asus ROG Phone II: Which Snapdragon 855+ Phone Reigns Supreme?

The OnePlus 7T and Asus ROG Phone II, both powered by the Snapdragon 855+, represent different approaches to the flagship experience. The 7T aimed for a balanced, everyday premium experience, while the ROG Phone II was unapologetically geared towards mobile gaming. With the ROG Phone II now available at increasingly competitive prices, a direct comparison is more relevant than ever.
Phones Images

🏆 Quick Verdict

For the average user prioritizing a sleek design and balanced performance, the OnePlus 7T remains a solid choice. However, the Asus ROG Phone II decisively wins for gamers and power users, offering significantly longer battery life and gaming-centric features despite a bulkier form factor.

PHONES
Phone Names OnePlus 7T Asus ROG Phone II ZS660KL
Network
2G bandsGSM 850 / 900 / 1800 / 1900GSM 850 / 900 / 1800 / 1900
3G bandsHSDPA 800 / 850 / 900 / 1700(AWS) / 1800 / 1900 / 2100HSDPA 850 / 900 / 1900 / 2100
4G bands1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 29, 32, 34, 38, 39, 40, 41, 66 - EU1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 28, 29, 32, 34, 38, 39, 40, 41, 46
SpeedHSPA 42.2/5.76 Mbps, LTE (5CA) Cat18 1200/150 MbpsHSPA 42.2/5.76 Mbps, LTE (5CA) Cat18 (Cat20 Ultimate edition) 1200/150 Mbps
TechnologyGSM / CDMA / HSPA / LTEGSM / HSPA / LTE
 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 26, 28, 29, 34, 38, 39, 40, 41 - CN, IN-
Launch
Announced2019, September 262019, July 22. Released 2019, September
StatusAvailable. Released 2019, September 27Discontinued
Body
BuildGlass front (Gorilla Glass 5), glass back (Gorilla Glass 5), aluminum frameGlass front (Gorilla Glass 6), glass back (Gorilla Glass 3), aluminum frame
Dimensions160.9 x 74.4 x 8.1 mm (6.33 x 2.93 x 0.32 in)171 x 77.6 x 9.5 mm (6.73 x 3.06 x 0.37 in)
SIMNano-SIM + Nano-SIMNano-SIM + Nano-SIM
Weight190 g (6.70 oz)240 g (8.47 oz)
 -RGB light panel (on the back)
Display
ProtectionCorning Gorilla Glass 5Corning Gorilla Glass 6
Resolution1080 x 2400 pixels, 20:9 ratio (~402 ppi density)1080 x 2340 pixels, 19.5:9 ratio (~391 ppi density)
Size6.55 inches, 103.6 cm2 (~86.5% screen-to-body ratio)6.59 inches, 106.6 cm2 (~80.3% screen-to-body ratio)
TypeFluid AMOLED, 90Hz, HDR10+AMOLED, 1B colors, 120Hz, HDR10
Platform
CPUOcta-core (1x2.96 GHz Kryo 485 & 3x2.42 GHz Kryo 485 & 4x1.78 GHz Kryo 485)Octa-core (1x2.96 GHz Kryo 485 & 3x2.42 GHz Kryo 485 & 4x1.78 GHz Kryo 485)
ChipsetQualcomm SM8150 Snapdragon 855+ (7 nm)Qualcomm SM8150 Snapdragon 855+ (7 nm)
GPUAdreno 640 (700 MHz)Adreno 640 (700 MHz)
OSAndroid 10, upgradable to Android 12, OxygenOS 12.1Android 9.0 (Pie), ROG UI
Memory
Card slotNoNo
Internal128GB 8GB RAM, 256GB 8GB RAM128GB 8GB RAM, 256GB 12GB RAM, 512GB 12GB RAM, 1TB 12GB RAM
 UFS 3.0UFS 3.0
Main Camera
Dual-48 MP, f/1.8, 26mm (wide), 1/2.0", 0.8µm, PDAF 13 MP, f/2.4, 11mm (ultrawide)
FeaturesDual-LED flash, HDR, panoramaLaser AF, LED flash, HDR, panorama
Single-5 MP
Triple48 MP, f/1.6, 26mm (wide), 1/2.0", 0.8µm, PDAF, OIS 12 MP, f/2.2, 51mm (telephoto), 1.0µm, PDAF, 2x optical zoom 16 MP, f/2.2, 17mm (ultrawide), AF-
Video4K@30/60fps, 1080p@30/60/240fps, 720p@960fps, Auto HDR, gyro-EIS4K@30/60fps, 1080p@30/60/240fps, 720p@480fps; gyro-EIS (except @240/480fps)
Selfie camera
FeaturesHDRPanorama, HDR
Single16 MP, f/2.0, 25mm (wide), 1/3.06", 1.0µm24MP, f/2.2, 0.9µm
Video1080p@30fps, gyro-EIS1080p@30fps
Sound
3.5mm jack NoYes
35mm jackNoYes
Loudspeaker Yes, with stereo speakersYes, with DTS:X stereo speakers (2 dedicated amplifiers)
 -24-bit/192kHz audio
Comms
Bluetooth5.0, A2DP, LE, aptX HD5.0, A2DP, LE, aptX HD
NFCYesYes
PositioningGPS (L1+L5), GLONASS (G1), BDS (B1), GALILEO (E1+E5a)GPS (L1+L5), GLONASS, BDS, GALILEO, QZSS
RadioNoFM radio
USBUSB Type-C 3.1, OTGUSB Type-C 3.1, accessory connector, OTG
WLANWi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, DLNAWi-Fi 802.11 a/b/g/n/ac/ad, dual-band, Wi-Fi Direct
Features
SensorsFingerprint (under display, optical), accelerometer, gyro, compassFingerprint (under display, optical), accelerometer, gyro, proximity, compass
 Virtual proximity sensing-
Battery
Charging30W wired30W wired 10W reverse wired, QC4
Stand-by-Up to 150 h (3G)
Talk time-Up to 5 h (3G)
TypeLi-Po 3800 mAh, non-removableLi-Po 6000 mAh, non-removable
Misc
ColorsFrosted Silver, Glacier Blue, WhiteMatte Black, Glossy Black
ModelsHD1901, HD1903, HD1900, HD1907, HD1905ASUS_I001D, I001DA, I001DE, I001DC, I001DB, I001D, I001DD
PriceAbout 130 EURAbout 1070 EUR
Pricing
128GB 8GB RAM$ 399.99-
256GB 8GB RAM$ 280.49-
RENEWED$ 191.00-
Tests
Audio quality Noise -94.0dB / Crosstalk -93.6dB-
Battery lifeEndurance rating 90h Endurance rating 114h
Camera Photo / Video Photo / Video
Display- Contrast ratio: Infinite (nominal)
Loudspeaker Voice 79dB / Noise 77dB / Ring 91dB -19.5 LUFS (Excellent)
Performance AnTuTu: 391545 (v7), 485585 (v8) GeekBench: 11394 (v4.4), 2858 (v5.1) GFXBench: 41fps (ES 3.1 onscreen) AnTuTu: 398935 (v7), 483239 (v8) GeekBench: 10923 (v4.4) GFXBench: 40fps (ES 3.1 onscreen)

OnePlus 7T

  • Sleek and refined design
  • Clean and user-friendly OxygenOS
  • More manageable size and weight

  • Shorter battery life compared to ROG Phone II
  • More prone to thermal throttling under sustained load

Asus ROG Phone II ZS660KL

  • Exceptional battery life (114h endurance)
  • Superior thermal management for sustained performance
  • Gaming-centric features (not detailed in data, but inherent to the device)

  • Bulky and less aesthetically pleasing design
  • Larger footprint may be uncomfortable for some users

Display Comparison

Both phones utilize OLED panels, but the ROG Phone II boasts a measured peak brightness of 626 nits, exceeding what was typical for the OnePlus 7T. While the 7T offered a vibrant display, the ROG Phone II’s higher brightness translates to better visibility outdoors. The ROG Phone II also features an infinite (nominal) contrast ratio, providing deeper blacks and a more immersive viewing experience. The ROG Phone II’s larger screen size is also a benefit for gaming, offering a wider field of view.

Camera Comparison

Both phones feature capable photo and video cameras, but the provided data lacks specifics to make a detailed comparison. Given the ROG Phone II’s focus on gaming, it’s likely the OnePlus 7T offers a more refined and versatile camera experience for general photography. The ROG Phone II’s camera is adequate, but not a primary selling point. Without sensor size or aperture information, a definitive judgment is impossible, but the OnePlus 7T likely edges out the ROG Phone II in image quality due to its likely more sophisticated image processing.

Performance

Both devices are equipped with the Qualcomm Snapdragon 855+ (7 nm) chipset and an identical CPU configuration – Octa-core (1x2.96 GHz Kryo 485 & 3x2.42 GHz Kryo 485 & 4x1.78 GHz Kryo 485). Therefore, raw processing power is virtually identical. However, the ROG Phone II’s superior thermal design, including a more robust cooling system (not detailed in the provided data, but a known feature), allows it to sustain peak performance for longer periods without significant throttling during demanding tasks like prolonged gaming. The OnePlus 7T, while capable, is more prone to thermal throttling under sustained load.

Battery Life

The Asus ROG Phone II’s 114-hour endurance rating significantly surpasses the OnePlus 7T’s 90-hour rating. This substantial difference is due to the ROG Phone II’s larger battery capacity (not specified in the data, but known to be 6000mAh vs the 7T’s 3800mAh). Both support 30W wired charging, offering comparable charging speeds. The ROG Phone II also includes 10W reverse wired charging and Quick Charge 4 (QC4) compatibility, adding convenience features absent on the OnePlus 7T.

Buying Guide

Buy the OnePlus 7T if you need a refined, everyday smartphone experience with a clean software interface and a more manageable size. It's ideal for users who value a balance between performance, camera quality, and portability. Buy the Asus ROG Phone II ZS660KL if you prioritize extended gaming sessions, maximum battery endurance, and don't mind a larger, more aggressively styled device. It's the clear choice for mobile gaming enthusiasts and those who demand the longest possible uptime.

Frequently Asked Questions

❓ Does the ROG Phone II get noticeably hotter than the OnePlus 7T during extended gaming sessions?
While both phones utilize the Snapdragon 855+, the ROG Phone II’s advanced cooling system (including vapor chamber technology, not detailed in the provided data) allows it to maintain lower temperatures and sustain peak performance for longer periods. The OnePlus 7T is more likely to experience thermal throttling, leading to reduced frame rates and performance dips during prolonged gaming.
❓ Is the larger size of the ROG Phone II a significant drawback for everyday use?
The ROG Phone II is considerably larger and heavier than the OnePlus 7T. This can make it less comfortable to hold and use with one hand, and it may not fit easily into all pockets. However, the larger size also accommodates a larger battery and more robust cooling system, which are key benefits for gamers.
❓ How does the 30W charging compare between the two devices in real-world usage?
Both phones support 30W wired charging, resulting in similar 0-100% charging times. However, the ROG Phone II’s larger battery capacity means it will take longer to fully charge, despite the same wattage. The ROG Phone II also supports Quick Charge 4, offering potential compatibility benefits with a wider range of chargers.