Product
Xiaomi Mi 8
Xiaomi Mi 8
Vivo X50
Vivo X50
Battery
Charging 18W wired, QC4 33W wired
Type Li-Po 3400 mAh, non-removable 4200 mAh
Body
Build Glass front (Gorilla Glass 5), glass back (Gorilla Glass 5), aluminum frame (7000 series) Glass front, glass back, aluminum frame
Dimensions 154.9 x 74.8 x 7.6 mm (6.10 x 2.94 x 0.30 in) 159.5 x 75.4 x 7.6 mm (6.28 x 2.97 x 0.30 in)
SIM Nano-SIM + Nano-SIM Nano-SIM + Nano-SIM
Weight 175 g (6.17 oz) 173 g (6.10 oz)
Comms
Bluetooth 5.0, A2DP, LE, aptX HD 5.1, A2DP, LE, aptX HD
NFC Yes Yes
Positioning GPS (L1+L5), GLONASS (L1), BDS (B1), GALILEO (E1+E5a), QZSS (L1+L5) GPS, GLONASS, GALILEO, BDS
Radio No No
USB USB Type-C USB Type-C, OTG
WLAN Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, DLNA Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct
Display
Protection Corning Gorilla Glass 5 -
Resolution 1080 x 2248 pixels (~402 ppi density) 1080 x 2376 pixels (~398 ppi density)
Size 6.21 inches, 97.1 cm2 (~83.8% screen-to-body ratio) 6.56 inches, 104.6 cm2 (~87.0% screen-to-body ratio)
Type Super AMOLED, HDR10 AMOLED, 90Hz, HDR10+
Features
Sensors Infrared Face ID, fingerprint (rear-mounted), accelerometer, gyro, proximity, barometer, compass Fingerprint (under display, optical), accelerometer, gyro, compass
  - Virtual proximity sensing
Launch
Announced 2018, May. Released 2018, June 2020, July 07
Status Discontinued Available. Released 2020, July 16
Main Camera
Dual 12 MP, f/1.8, 1/2.55", 1.4µm, dual pixel PDAF, 4-axis OIS 12 MP, f/2.4, 56mm (telephoto), 1/3.4", 1.0µm, AF, 2x optical zoom -
Features Dual-LED flash, HDR, panorama Color spectrum sensor, Dual-LED dual-tone flash, HDR, panorama
Quad - 48 MP, f/1.6, (wide), PDAF, OIS 13 MP, f/2.5, 50mm (telephoto), 1/2.8", 0.8µm, PDAF, 2x optical zoom 8 MP, f/2.2, 120˚, 16mm (ultrawide), 1/4.0", 1.12µm 5 MP, f/2.5, (macro)
Video 4K@30/60fps, 1080p@30/120/240fps, 720p@960fps 4K@30fps, 1080p@30fps, gyro-EIS
Memory
Card slot No No
Internal 64GB 6GB RAM, 128GB 6GB RAM, 128GB 8GB RAM, 256GB 6GB RAM 128GB 8GB RAM, 256GB 8GB RAM
  UFS 2.1 UFS 2.1
Misc
Colors Black, Blue, White, Gold Glaze Black, Frost Blue
Models M1803E1A 2004
SAR 0.70 W/kg (head)     1.66 W/kg (body)     -
SAR EU 1.01 W/kg (head)     1.32 W/kg (body)     -
Network
2G bands GSM 850 / 900 / 1800 / 1900 GSM 850 / 900 / 1800 / 1900
3G bands HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 HSDPA 900 / 2100
4G bands 1, 2, 3, 4, 5, 7, 8, 12, 17, 20, 34, 38, 39, 40, 41 1, 3, 5, 8, 40
Speed HSPA 42.2/5.76 Mbps, LTE (4CA) Cat16 1024/150 Mbps HSPA, LTE
Technology GSM / CDMA / HSPA / LTE GSM / HSPA / LTE
  CDMA 800 & TD-SCDMA -
Our Tests
Audio quality Noise -93.9dB / Crosstalk -93.7dB -
Battery (old) Endurance rating 86h -
Camera Photo / Video -
Display Contrast ratio: Infinite (nominal), 4.086 (sunlight) -
Loudspeaker -29.1 LUFS (Average) -
Performance AnTuTu: 217298 (v7), 341687 (v8) GeekBench: 8494 (v4.4), 2002 (v5.1) GFXBench: 33fps (ES 3.1 onscreen) -
Platform
Chipset Qualcomm SDM845 Snapdragon 845 (10 nm) Qualcomm SDM730 Snapdragon 730 (8 nm)
CPU Octa-core (4x2.8 GHz Kryo 385 Gold & 4x1.8 GHz Kryo 385 Silver) Octa-core (2x2.2 GHz Kryo 470 Gold & 6x1.8 GHz Kryo 470 Silver)
GPU Adreno 630 Adreno 618
OS Android 8.1 (Oreo), upgradable to Android 10, MIUI 12 Android 10, Funtouch 10.5
Selfie camera
Features - HDR
Single 20 MP, f/2.0, (wide), 1/3", 0.9µm 32 MP, f/2.5, 26mm (wide), 1/2.8", 0.8µm
Video 1080p@30fps 1080p@30fps
Sound
3.5mm jack No No
Loudspeaker Yes Yes
  - 24-bit/192kHz Hi-Res audio