Product
Xiaomi Mi A2 (Mi 6X)
Xiaomi Mi A2 (Mi 6X)
Vivo Y9s
Vivo Y9s
Battery
Charging 18W wired, QC3 (Global) 18W wired, QC4 (India) 18W wired
Type Li-Po 3000 mAh, non-removable 4500 mAh, non-removable
Body
Build Glass front, aluminum back, aluminum frame Glass front, glass back, aluminum frame
Dimensions 158.7 x 75.4 x 7.3 mm (6.25 x 2.97 x 0.29 in) 159.3 x 75.2 x 8.7 mm (6.27 x 2.96 x 0.34 in)
SIM Nano-SIM + Nano-SIM Nano-SIM + Nano-SIM
Weight 166 g (5.86 oz) 186.7 g (6.60 oz)
Comms
Bluetooth 5.0, A2DP, LE 5.0, A2DP, LE
Infrared port Yes -
NFC No No
Positioning GPS, GLONASS, BDS GPS, GLONASS, BDS
Radio No FM radio
USB USB Type-C 2.0 USB Type-C 2.0, OTG
WLAN Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct
Display
Resolution 1080 x 2160 pixels, 18:9 ratio (~403 ppi density) 1080 x 2340 pixels, 19.5:9 ratio (~404 ppi density)
Size 5.99 inches, 92.6 cm2 (~77.4% screen-to-body ratio) 6.38 inches, 99.9 cm2 (~83.4% screen-to-body ratio)
Type IPS LCD Super AMOLED
Features
Sensors Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass Fingerprint (under display, optical), accelerometer, gyro, proximity, compass
Launch
Announced 2018, July 24. Released 2018, July 2019, December. Released 2019, December
Status Discontinued Discontinued
Main Camera
Dual 12 MP, f/1.8, 1/2.9", 1.25µm 20 MP, f/1.8, 1/2.8", 1.0µm, PDAF -
Features Dual-LED flash, HDR, panorama LED flash, HDR, panorama
Quad - 48 MP, f/1.8, (wide), 1/2.0", 0.8µm, PDAF 8 MP, f/2.2, 13mm (ultrawide), 1/4.0", 1.12µm 2 MP, f/2.4, (macro) 2 MP, f/2.4, (depth)
Video 4K@30fps, 1080p@30fps (gyro-EIS), 720p@120fps 1080p@30fps
Memory
Card slot No microSDXC (uses shared SIM slot)
Internal 32GB 4GB RAM, 64GB 4GB RAM, 128GB 6GB RAM 128GB 8GB RAM
  eMMC 5.1 -
Misc
Colors Black, Gold, Blue, Red, Rose Gold Fancy Sky, Knight Black, Nebula Blue
Models M1804D2SG, M1804D2SI, Mi A2, Mi 6X V1945A, V1945T
SAR 0.96 W/kg (head)     0.64 W/kg (body)     -
SAR EU 1.16 W/kg (head)     0.66 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 - Global HSDPA 850 / 900 / 2100
4G bands 1, 2, 3, 4, 5, 7, 8, 20, 38, 40 - Global 1, 3, 5, 8, 34, 38, 39, 40, 41
Speed HSPA 42.2/5.76 Mbps, LTE (3CA) Cat12 600/150 Mbps HSPA, LTE
Technology GSM / CDMA / HSPA / LTE GSM / CDMA / HSPA / LTE
  1, 3, 5, 7, 8, 34, 38, 39, 40, 41 - China CDMA 800 & TD-SCDMA
Our Tests
Battery (old) Endurance rating 73h -
Camera Photo / Video -
Loudspeaker Voice 89dB / Noise 72dB / Ring 89dB -
Performance AnTuTu: 130927 (v7), 172886 (v8) GeekBench: 4625 (v4.4), 1157 (v5.1) GFXBench: 8.6fps (ES 3.1 onscreen) -
Platform
Chipset Qualcomm SDM660 Snapdragon 660 (14 nm) Qualcomm SDM665 Snapdragon 665 (11 nm)
CPU Octa-core (4x2.2 GHz Kryo 260 Gold & 4x1.8 GHz Kryo 260 Silver) Octa-core (4x2.0 GHz Kryo 260 Gold & 4x1.8 GHz Kryo 260 Silver)
GPU Adreno 512 Adreno 610
OS Android 8.1 (Oreo), upgradable to Android 9.0 (Pie), Android One Android 9.0 (Pie), Funtouch 9
Selfie camera
Features LED flash, HDR HDR
Single 20 MP, f/2.2, (wide), 1/3", 0.9µm 32 MP, f/2.0, 26mm (wide), 1/2.8", 0.8µm
Video 1080p@30fps 1080p@30fps
Sound
3.5mm jack No Yes
Loudspeaker Yes Yes