verykool s351 vs vivo X21

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.

• Weight

  s351: 65.7 g lighter

  s351:

  90.5 g

  X21:

  156.2 g

• Width

  s351: 12.1 mm narrower

  s351:

  62.7 mm

  X21:

  74.8 mm

• Screen diagonal

  s351: 2.78 in smaller diagonal

  s351:

  3.5 in

  X21:

  6.28 in

• Rear camera layout

  s351:

  Single

  X21:

  Dual

• Depth

  X21: 5.3 mm thinner

  s351:

  12.7 mm

  X21:

  7.4 mm

• Height

  s351: 37.6 mm shorter

  s351:

  116.9 mm

  X21:

  154.5 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. s351

   Height:

   116.9 mm

   Width:

   62.7 mm

   Depth:

   12.7 mm +5.3 mm versus X21

2. 2. X21

   Height:

   154.5 mm +37.6 mm versus s351

   Width:

   74.8 mm +12.1 mm versus s351

   Depth:

   7.4 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.

At least two phones need compatible screen dimensions for a drawing.

1. 1. s351

   s351: Screen geometry unavailable or conflicting.

2. 2. X21

   Screen diagonal:

   6.28 in

   Aspect ratio (height:width):

   19:9

   Approximate rectangular screen area:

   98.4 cm²

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.