Allview V4 Viper Pro vs vivo X20 Plus UD

Key differences

Calculated from recorded specifications using minimum difference thresholds. These are differences, not an overall ranking. For three phones, numeric highlights compare the two extremes.

• Display technology

  OLED versus LCD

  V4 Viper Pro:

  LCD

  X20 Plus UD:

  OLED

• Weight

  X20 Plus UD: 10.1 g lighter

  V4 Viper Pro:

  191.6 g

  X20 Plus UD:

  181.5 g

• Width

  X20 Plus UD: 1.9 mm narrower

  V4 Viper Pro:

  82 mm

  X20 Plus UD:

  80.1 mm

• Screen diagonal

  X20 Plus UD: 0.37 in smaller diagonal

  V4 Viper Pro:

  6.8 in

  X20 Plus UD:

  6.43 in

• Chipset

  V4 Viper Pro:

  Mediatek MT6739 (28 nm)

  X20 Plus UD:

  Qualcomm SDM660 Snapdragon 660 (14 nm)

• Depth

  X20 Plus UD: 1.3 mm thinner

  V4 Viper Pro:

  8.8 mm

  X20 Plus UD:

  7.5 mm

Relative size, not calibrated actual size. Front and side outlines share one scale and a bottom baseline. Generic outlines use recorded body dimensions, excluding camera bumps.

1. 1. V4 Viper Pro

   Height:

   171 mm +15.7 mm versus X20 Plus UD

   Width:

   82 mm +1.9 mm versus X20 Plus UD

   Depth:

   8.8 mm +1.3 mm versus X20 Plus UD

2. 2. X20 Plus UD

   Height:

   155.3 mm

   Width:

   80.1 mm

   Depth:

   7.5 mm

Screen size

Approximate rectangular screens calculated from recorded diagonal and aspect ratio at one relative scale. Rounded corners and cutouts are not subtracted. These are not phone outlines or calibrated actual sizes.

1. 1. V4 Viper Pro

   Screen diagonal:

   6.8 in

   Aspect ratio (height:width):

   19:9

   Approximate rectangular screen area:

   115.4 cm²

2. 2. X20 Plus UD

   Screen diagonal:

   6.43 in

   Aspect ratio (height:width):

   18:9

   Approximate rectangular screen area:

   106.7 cm²

V4 Viper Pro has approximately 8.2% more rectangular screen area than X20 Plus UD.

Memory variants

Each row compares the same storage capacity. Cells show recorded RAM alternatives, not combined maxima. Not recorded does not mean unavailable in every market.

Practical features

Explicit Yes and No values are shown directly. Qualified or regional records retain their details. Unknown means the record is missing.

Battery capacity

Capacity is not battery life. No endurance test is implied.

Open a section for more detail. On narrow screens, swipe sideways or use Left/Right arrow keys while the table is focused. Unknown means missing data, not No. Recorded zero values are shown as recorded.