Sony Xperia X Performance vs Xiaomi Mi 9

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

  Xperia X Performance:

  LCD

  Mi 9:

  OLED

• Weight

  Xperia X Performance: 8.6 g lighter

  Xperia X Performance:

  164.4 g

  Mi 9:

  173 g

• Width

  Xperia X Performance: 4.3 mm narrower

  Xperia X Performance:

  70.4 mm

  Mi 9:

  74.7 mm

• Screen diagonal

  Xperia X Performance: 1.39 in smaller diagonal

  Xperia X Performance:

  5 in

  Mi 9:

  6.39 in

• Chipset

  Xperia X Performance:

  Qualcomm MSM8996 Snapdragon 820 (14 nm)

  Mi 9:

  Qualcomm SDM855 Snapdragon 855 (7 nm)

• Rear camera layout

  Xperia X Performance:

  Single

  Mi 9:

  Triple

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. Xperia X Performance

   Height:

   143.7 mm

   Width:

   70.4 mm

   Depth:

   8.7 mm +1.1 mm versus Mi 9

2. 2. Mi 9

   Height:

   157.5 mm +13.8 mm versus Xperia X Performance

   Width:

   74.7 mm +4.3 mm versus Xperia X Performance

   Depth:

   7.6 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. Xperia X Performance

   Screen diagonal:

   5 in

   Aspect ratio (height:width):

   16:9

   Approximate rectangular screen area:

   68.9 cm²

2. 2. Mi 9

   Screen diagonal:

   6.39 in

   Aspect ratio (height:width):

   19.5:9

   Approximate rectangular screen area:

   100.2 cm²

Mi 9 has approximately 45.4% more rectangular screen area than Xperia X Performance.

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.