Product
Vivo Z3i
Vivo Z3i
Xiaomi Mi CC9
Xiaomi Mi CC9
Battery
Charging 18W wired 18W wired
Type 3315 mAh, non-removable Li-Po 4030 mAh, non-removable
Body
Build - Glass front (Gorilla Glass 5), glass back (Gorilla Glass 5), aluminum frame
Dimensions 156 x 75.6 x 8.1 mm (6.14 x 2.98 x 0.32 in) 156.8 x 74.5 x 8.7 mm (6.17 x 2.93 x 0.34 in)
SIM Nano-SIM + Nano-SIM Nano-SIM + Nano-SIM
Weight 164 g (5.78 oz) 179 g (6.31 oz)
Comms
Bluetooth 4.2, A2DP, EDR, LE, aptX 5.0, A2DP, LE, aptX HD
Infrared port - Yes
NFC No Yes
Positioning GPS, GLONASS, BDS GPS, GLONASS, GALILEO, BDS
Radio FM radio FM radio
USB microUSB 2.0, OTG USB Type-C 2.0
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
Protection - Corning Gorilla Glass 5
Resolution 1080 x 2280 pixels, 19:9 ratio (~400 ppi density) 1080 x 2340 pixels, 19.5:9 ratio (~403 ppi density)
Size 6.3 inches, 99.1 cm2 (~84.0% screen-to-body ratio) 6.39 inches, 100.2 cm2 (~85.8% screen-to-body ratio)
Type IPS LCD Super AMOLED, HDR, 430 nits (typ)
Features
Sensors Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass Fingerprint (under display, optical), accelerometer, gyro, proximity, compass
Launch
Announced 2018, October. Released 2018, October 2019, July. Released 2019, July
Status Discontinued Discontinued
Main Camera
Dual 16 MP, f/2.0, PDAF 2 MP, f/2.4, (depth) -
Features LED flash, HDR, panorama LED flash, HDR, panorama
Triple - 48 MP, f/1.8, (wide), 1/2.0", 0.8µm, PDAF 8 MP, (ultrawide), 1/4.0", 1.12µm 2 MP, (depth)
Video 1080p@30fps 4K@30fps, 1080p@30/60/120fps, 720p@960fps
Memory
Card slot microSDXC (dedicated slot) microSDXC (uses shared SIM slot)
Internal 128GB 6GB RAM 64GB 6GB RAM, 128GB 6GB RAM, 256GB 8GB RAM
  eMMC 5.1 UFS 2.1
Misc
Colors Aurora blue, Millenium Pink Black, Blue, White
Network
2G bands GSM 850 / 900 / 1800 / 1900 GSM 850 / 900 / 1800 / 1900
3G bands HSDPA 850 / 900 / 2100 HSDPA 850 / 900 / 1900 / 2100
4G bands 1, 3, 5, 8, 34, 38, 39, 40, 41 1, 3, 5, 8, 34, 38, 39, 40, 41
Speed HSPA, LTE HSPA, LTE
Technology GSM / CDMA / HSPA / LTE GSM / CDMA / HSPA / LTE
  CDMA 800 / 1900 & TD-SCDMA CDMA 800 & TD-SCDMA
Platform
Chipset Mediatek MT6771 Helio P60 (12 nm) Qualcomm SDM710 Snapdragon 710 (10 nm)
CPU Octa-core (4x2.0 GHz Cortex-A73 & 4x2.0 GHz Cortex-A53) Octa-core (2x2.2 GHz Kryo 360 Gold & 6x1.7 GHz Kryo 360 Silver)
GPU Mali-G72 MP3 Adreno 616
OS Android 8.1 (Oreo) Android 9.0 (Pie), upgradable to Android 10, MIUI 11
Selfie camera
Features HDR HDR
Single 24 MP, f/2.0, 26mm (wide), 1/2.8", 0.9µm 32 MP, f/2.0, 26mm (wide), 1/2.8", 0.8µm
Video 1080p@30fps 1080p@30fps
Sound
3.5mm jack Yes Yes
Loudspeaker Yes Yes