Oppo R9s vs vivo X21i

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

  R9s: 14 g lighter

  R9s:

  145 g

  X21i:

  159 g

• Screen diagonal

  R9s: 0.78 in smaller diagonal

  R9s:

  5.5 in

  X21i:

  6.28 in

• Chipset

  R9s:

  Qualcomm MSM8953 Snapdragon 625 (14 nm)

  X21i:

  Mediatek MT6771 Helio P60 (12 nm)

• Rear camera layout

  R9s:

  Single

  X21i:

  Dual

• Release year

  R9s:

  2016

  X21i:

  2018

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. R9s

   Height:

   153 mm

   Width:

   74.3 mm

   Depth:

   6.6 mm

2. 2. X21i

   Height:

   154.4 mm

   Width:

   75 mm

   Depth:

   7 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. R9s

   Screen diagonal:

   5.5 in

   Aspect ratio (height:width):

   16:9

   Approximate rectangular screen area:

   83.4 cm²

2. 2. X21i

   Screen diagonal:

   6.28 in

   Aspect ratio (height:width):

   19:9

   Approximate rectangular screen area:

   98.4 cm²

X21i has approximately 18% more rectangular screen area than R9s.

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.

No unambiguous storage/RAM pairings are recorded. See the original specifications below.

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.