Apple iPhone X 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

  X21: 17.8 g lighter

  iPhone X:

  174 g

  X21:

  156.2 g

• Width

  iPhone X: 3.9 mm narrower

  iPhone X:

  70.9 mm

  X21:

  74.8 mm

• Screen diagonal

  iPhone X: 0.48 in smaller diagonal

  iPhone X:

  5.8 in

  X21:

  6.28 in

• Memory variants

  At 64 GB storage

  iPhone X:

  3 GB RAM

  X21:

  6 GB RAM

• Chipset

  iPhone X:

  Apple A11 Bionic (10 nm)

  X21:

  Qualcomm SDM660 Snapdragon 660 (14 nm)

• Height

  iPhone X: 10.9 mm shorter

  iPhone X:

  143.6 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. iPhone X

   Height:

   143.6 mm

   Width:

   70.9 mm

   Depth:

   7.7 mm

2. 2. X21

   Height:

   154.5 mm +10.9 mm versus iPhone X

   Width:

   74.8 mm +3.9 mm versus iPhone X

   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.

1. 1. iPhone X

   Screen diagonal:

   5.8 in

   Aspect ratio (height:width):

   19.5:9

   Approximate rectangular screen area:

   82.6 cm²

2. 2. X21

   Screen diagonal:

   6.28 in

   Aspect ratio (height:width):

   19:9

   Approximate rectangular screen area:

   98.4 cm²

X21 has approximately 19.2% more rectangular screen area than iPhone X.

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.