Asus ROG Phone 3 ZS661KS vs vivo X21i

Asus ROG Phone 3 ZS661KS

vivo X21i

Network
2G network

GSM 850, 900, 1800, 1900; CDMA 800 & TD-SCDMA

GSM 850, 900, 1800, 1900; CDMA 800 & TD-SCDMA
3G network

HSDPA 800, 850, 900, 1700(AWS), 1800, 1900, 2100 - A version; HSDPA 850, 900, 1700(AWS), 1900, 2100 - B version

HSDPA 850, 900, 2100
4G network

LTE frequency band 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 29, 30, 32, 34, 38, 39, 40, 41, 42, 48, 66, 71 - A version; LTE frequency band 1, 2, 3, 4, 5, 7, 8, 20, 28, 34, 38, 39, 40, 41 - B version

LTE frequency band 1(2100), 3(1800), 4(1700/2100), 5(850), 8(900), 38(2600), 39(1900), 40(2300), 41(2500)
5G network

5G band 1, 2, 3, 5, 28, 41, 66, 71, 77, 78, 79; SA/NSA - A version; 5G band 41, 77, 78, 79 SA/NSA - B version

-
HSDPA speed

42.2 Mbps

-
HSUPA speed

5.76 Mbps

-
HSPA speed

-

HSPA
LTE speed

LTE-A, (6CA) Cat20, 2000 Mbps download, 150 Mbps upload

LTE
5G speed

4.4 Gbps download

-
GPRS

Yes

Yes
EDGE

Yes

Yes

Design
Build

Glass front (Gorilla Glass 6), glass back (Gorilla Glass 3), aluminum frame

Aluminium alloy, glass
SIM

Dual SIM (Nano-SIM, dual stand-by)

Hybrid Dual SIM (Nano-SIM, dual stand-by)
Height

171 mm

154.4 mm
Width

78 mm

75 mm
Thickness

9.9 mm

7 mm
Weight

240 g

159 g
Build features

RGB light panel (on the back), Pressure sensitive zones (Gaming triggers)

-
Colors

Black

Aurora White, Black, Ruby Red

Display
Display type

AMOLED capacitive touchscreen

Super AMOLED capacitive touchscreen
Physical size

6.59 inches

6.28 inches
Resolution

1080 x 2340 pixels

1080 x 2280 pixels
Pixel density

391 ppi

402 ppi
Display colors

1073741824

16777216
Protection

Corning Gorilla Glass 6

-
Multitouch

-

Yes
Display features

HDR10+, 144Hz refresh rate, 650 nits max. brightness

-
DxOMark display score

70

-

Main camera
Camera type

Triple

Dual
Main camera

64 MP, f/1.8 , 26 mm, 1/1.72" , 0.8 µm

12 MP, f/1.8 , 1/2.5" , 1.4 µm
13 MP, f/2.4 , 11 mm

5 MP, f/2.4
5 MP, f/2.0
Primary camera resolution

-

4032 x 3024 pixels
Primary camera video

8K@30fps, 4K@30/60/120fps, 1080p@30/60/240fps, 720p@480fps; gyro-EIS

1080p@30fps
Primary camera Autofocus

-

dual pixel phase detection autofocus
Primary camera flash

LED flash

LED flash
Camera features

HDR, Panorama

Geo-tagging, HDR, face detection, panorama, touch focus

Connectivity
WLAN

Wi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11n 5GHz, 802.11ac, 802.11ad

Wi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac
WLAN WiFi Hotspot

Yes

Yes
WLAN WiFi Direct

Yes

Yes
Wi-Fi display

Yes

-
WLAN WiFi Dual Band

Yes

Yes
USB

Type-C 3.1 (side), Type-C 2.0 (bottom)

microUSB 2.0
USB connector

Accessory connector

-
USB On-The-Go

-

Yes
Bluetooth

v5.1

v5.0
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
Bluetooth AptX

aptX HD, aptX Adaptive

-
NFC

Yes

-
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

Yes
GALILEO

Yes

-
BDS

Yes

-
QZSS

Yes

-
GNSS

Yes

-

Features
Messaging SMS

-

SMS(threaded view)
Messaging MMS

-

MMS
Messaging Email

-

Email
Messaging Push Email

-

Push Email
Sensors

Accelerometer, compass, fingerprint, gyroscope, proximity

Fingerprint (rear-mounted), accelerometer, compass, proximity