Oppo A7x 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.

• Display technology

  OLED versus LCD

  A7x:

  LCD

  X21:

  OLED

• Weight

  X21: 12.8 g lighter

  A7x:

  169 g

  X21:

  156.2 g

• Chipset

  A7x:

  Mediatek MT6771 Helio P60 (12 nm)

  X21:

  Qualcomm SDM660 Snapdragon 660 (14 nm)

• Depth

  X21: 0.6 mm thinner

  A7x:

  8 mm

  X21:

  7.4 mm

• Height

  X21: 2.2 mm shorter

  A7x:

  156.7 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. A7x

   Height:

   156.7 mm +2.2 mm versus X21

   Width:

   74 mm

   Depth:

   8 mm +0.6 mm versus X21

2. 2. X21

   Height:

   154.5 mm

   Width:

   74.8 mm

   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. A7x

   Screen diagonal:

   6.3 in

   Aspect ratio (height:width):

   19.5:9

   Approximate rectangular screen area:

   97.4 cm²

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.