Product
Oppo K9 Pro
Oppo K9 Pro
Vivo X6S
Vivo X6S
Battery
Charging 60W wired, 50% in 16 min 18W wired
Type Li-Po 4500 mAh Li-Ion 2400 mAh, non-removable
Body
Dimensions 158.7 x 73.5 x 8.5 mm (6.25 x 2.89 x 0.33 in) 147.9 x 73.8 x 6.7 mm (5.82 x 2.91 x 0.26 in)
SIM Nano-SIM + Nano-SIM Nano-SIM + Micro-SIM
Weight 180 g (6.35 oz) 140.5 g (4.97 oz)
Comms
Bluetooth 5.2, A2DP, LE, aptX HD 4.0, A2DP
NFC Yes No
Positioning GPS, GLONASS, GALILEO, BDS, QZSS GPS
Radio No FM radio
USB USB Type-C 2.0, OTG microUSB 2.0, OTG
WLAN Wi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi Direct Wi-Fi 802.11 b/g/n, hotspot
Display
Resolution 1080 x 2400 pixels, 20:9 ratio (~409 ppi density) 1080 x 1920 pixels, 16:9 ratio (~424 ppi density)
Size 6.43 inches, 99.8 cm2 (~85.6% screen-to-body ratio) 5.2 inches, 74.5 cm2 (~68.3% screen-to-body ratio)
Type AMOLED, 120Hz, HDR10, 430 nits (typ), 800 nits (peak) Super AMOLED
Features
Sensors Fingerprint (under display, optical), accelerometer, gyro, proximity, compass Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass
Launch
Announced 2021, September 26 2016, March. Released 2016, April
Status Available. Released 2021, October 20 Discontinued
Main Camera
Features Dual-LED dual-tone flash, HDR, panorama LED flash, panorama, HDR
Single - 13 MP, f/2.2, PDAF
Triple 64 MP, f/1.7, 26mm (wide), PDAF 8 MP, f/2.2, 119˚ (ultrawide) 2 MP, f/2.4, (macro) -
Video 4K@30fps, 1080p@30/60/120fps; gyro-EIS 1080p@30fps
Memory
Card slot No microSDXC (uses shared SIM slot)
Internal 128GB 8GB RAM, 256GB 12GB RAM, 256GB 8GB RAM 64GB 4GB RAM
  UFS 3.1 eMMC 5.1
Misc
Colors Black, Aurora Silver, Gold, Rose Gold
Models PEYM00 -
Network
2G bands GSM 850 / 900 / 1800 / 1900 GSM 900 / 1800 - SIM 1 & SIM 2
3G bands HSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100 HSDPA 850 / 900 / 1900 / 2100
4G bands 1, 2, 3, 4, 5, 7, 8, 28, 34, 38, 39, 40, 41 1, 3, 4, 38, 39, 40, 41
5G bands 1, 28, 41, 77, 78 SA/NSA -
Speed HSPA, LTE, 5G HSPA, LTE
Technology GSM / CDMA / HSPA / CDMA2000 / LTE / 5G GSM / HSPA / LTE
  CDMA2000 1x TD-SCDMA
Platform
Chipset Mediatek Dimensity 1200 (6 nm) Qualcomm MSM8976 Snapdragon 652 (28 nm)
CPU Octa-core (1x3.0 GHz Cortex-A78 & 3x2.6 GHz Cortex-A78 & 4x2.0 GHz Cortex-A55) Octa-core (4x1.8 GHz Cortex-A72 & 4x1.4 GHz Cortex-A53)
GPU Mali-G77 MC9 Adreno 510
OS Android 11, ColorOS 11.3 Android 5.1 (Lollipop), Funtouch 2.5
Selfie camera
Single 16 MP, f/2.4, (wide) 8 MP, f/2.4
Video 1080p@30fps, gyro-EIS
Sound
3.5mm jack Yes Yes
Loudspeaker Yes, with stereo speakers Yes
  - 32-bit/192kHz audio