Vivo
Vivo X20

Vivo
Vivo X9s

Features
Fingerprint (front-mounted), accelerometer, proximity, compass
Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass, - Fast battery charging 9V/2A 18W
Fingerprint (front-mounted), accelerometer, proximity, compass, Fast battery charging
Memory
No, 64 GB, 4 GB RAM
microSD, up to 256 GB (uses SIM 2 slot), 64 GB, 4 GB RAM
No, 64 GB, 4 GB RAM
Display
1080 x 1920 pixels, 16:9 ratio (~377 ppi density), AMOLED capacitive touchscreen, 16M colors, 5.85 inches, 94.3 cm2 (~73.5% screen-to-body ratio)
1080 x 2160 pixels, 18:9 ratio (~402 ppi density), Super AMOLED capacitive touchscreen, 16M colors, 6.01 inches, 93.2 cm2 (~79.5% screen-to-body ratio), - Funtouch 3.2
1080 x 1920 pixels, 16:9 ratio (~401 ppi density), AMOLED capacitive touchscreen, 16M colors, 5.5 inches, 83.4 cm2 (~73.8% screen-to-body ratio), Funtouch OS 3.1
Battery
Fast charging 18W, Li-Ion 4015 mAh, non-removable
Non-removable Li-Ion 3250 mAh battery
Charging 10W, 3320 mAh, Li-Ion 3320 mAh, non-removable
Selfie Camera
20 MP, f/2.0, (wide), 1/2.8", 1.0µm, 5 MP, depth sensor
-
LED flash, 20 MP, f/2.0, (wide), 1/2.8", 1.0µm
5 MP, depth sensor
Main Camera
1080p@30fps, LED flash, HDR, panorama, 16 MP, 1/2.8", PDAF
1080p@30fps, LED flash, HDR, panorama, 12 MP, f/1.8, AF, 5 MP, depth sensor
1080p@30fps, LED flash, HDR, panorama, 16 MP, 1/2.8", PDAF