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UleFone RugKing 4 Pro vs Vivo Y31

What RugKing 4 Pro does better (4) and where Y31 wins (11) — every spec side by side.

UleFone RugKing 4 Pro
UleFone · 2025RugKing 4 Pro
6.7Score
4 advantages≈ $170
vs
Vivo Y31
Vivo · 2025Y31
7.4Score
11 advantages≈ $160
Higher score
5.2Display6.2
3.9Camera4.6
7.9Battery8.4
6.0Features6.7
Dimensions

Size comparison

RugKing 4 ProY31
84 × 178.619.277 × 166.18.4
RugKing 4 ProY31Difference
Height178.6 mm166.1 mm+12.5 mm
Width84 mm77 mm+7 mm
Thickness19.2 mm8.4 mm+10.8 mm
Weight405 g209 g+196 g

Drawn to the same scale from the official dimensions (front and side).

Why is RugKing 4 Pro better than Y31?

  1. Battery capacity10,200 mAh vs 6,500 mAh+57%
  2. NFCYes · Y31: No
  3. Storage (base)256 GB vs 128 GB2×
  4. Bluetooth5.2 vs 4.2+24%

Why is Y31 better than RugKing 4 Pro?

  1. Wired charging18 W vs 44 W2.4×
  2. Peak brightness500 nits vs 1,000 nits2×
  3. Storage (max)256 GB vs 512 GB2×
  4. 5GNo · RugKing 4 Pro: Yes
  5. Stereo speakersNo · RugKing 4 Pro: Yes
  6. Weight405 g vs 209 g+94%
  7. Process12 nm vs 4 nm3×
  8. Main camera48 MP vs 50 MP+4%
  9. Thickness19.2 mm vs 8.4 mm2.3×
  10. CPU frequency1.8 GHz vs 2.2 GHz+22%
  11. Screen-to-body ratio68.9% vs 84%+22%
Specifications

Side by side

Vivo Y31Vivo Y31≈ $1607.4
Design
Weight405 g209 g
Thickness19.2 mm8.4 mm
Height178.6 mm166.1 mm
Width84 mm77 mm
Ingress protectionIP68IP68
Water resistance (IPx)IPx8IPx8
Glass protectionCorning Gorilla Glass 3Guardian Glass (ion-strengthened)
ColoursBlack, OrangeRose Red, Diamond Green
Display
Screen size6.6″6.7″
PanelIPS LCDIPS LCD
OLED panelNoNo
Resolution (width)720 px720 px
Resolution (height)1,612 px1,608 px
Pixel density269 ppi264 ppi
Refresh rate120 Hz120 Hz
Peak brightness500 nits1,000 nits
Screen-to-body ratio68.9%84%
Performance
ChipsetUnisoc T7250Qualcomm SM4450 Snapdragon 4 Gen 2
Chip makerUnisocQualcomm
Process12 nm4 nm
CPU cores88
CPU frequency1.8 GHz2.2 GHz
GPUMali-G57 MP1Adreno 613
Memory
RAM8 GB8 GB
Storage (max)256 GB512 GB
Storage (base)256 GB128 GB
Storage typeUFS 2.2eMMC 5.1
Memory card slotYesYes
Camera
Main camera48 MP50 MP
Main camera aperturef/1.8f/1.8
Rear cameras11
Optical stabilisationNoNo
Ultra-wide cameraNoNo
Telephoto cameraNoNo
Max video1080p1080p
Selfie camera8 MP8 MP
4K selfie videoNoNo
Battery
Battery capacity10,200 mAh6,500 mAh
Battery typeLi-PoLi-Ion
Wired charging18 W44 W
Charged in 30 min—39%
Wireless chargingNoNo
Reverse wireless chargingYes—
Connectivity
5GNoYes
eSIMNoNo
Dual SIMYesYes
Wi-Fi standardWi-Fi 5Wi-Fi 5
Bluetooth5.24.2
NFCYesNo
USBUSB Type-C 2.0USB Type-C 2.0
USB version22
Satellite navigationGLONASS, GALILEO, BDSGLONASS, GALILEO, BDS, QZSS
Features
Stereo speakersNoYes
3.5 mm headphone jackNoNo
Fingerprint sensorSideSide
SensorsFingerprint (side-mounted), accelerometer, proximity, compassFingerprint (side-mounted), accelerometer, proximity, compass
SAR (head)—1.13 W/kg
Software
OS at launchAndroid 15Android 15
PlatformAndroidAndroid
Interface—Funtouch 15

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