Oppo Joy Plus 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

  Joy Plus:

  LCD

  Mi 9:

  OLED

• Weight

  Joy Plus: 48 g lighter

  Joy Plus:

  125 g

  Mi 9:

  173 g

• Width

  Joy Plus: 11.7 mm narrower

  Joy Plus:

  63 mm

  Mi 9:

  74.7 mm

• Screen diagonal

  Joy Plus: 2.39 in smaller diagonal

  Joy Plus:

  4 in

  Mi 9:

  6.39 in

• Chipset

  Joy Plus:

  Mediatek MT6572 (28 nm)

  Mi 9:

  Qualcomm SDM855 Snapdragon 855 (7 nm)

• Rear camera layout

  Joy Plus:

  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. Joy Plus

   Height:

   124 mm

   Width:

   63 mm

   Depth:

   9.9 mm +2.3 mm versus Mi 9

2. 2. Mi 9

   Height:

   157.5 mm +33.5 mm versus Joy Plus

   Width:

   74.7 mm +11.7 mm versus Joy Plus

   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. Joy Plus

   Screen diagonal:

   4 in

   Aspect ratio (height:width):

   5:3

   Approximate rectangular screen area:

   45.5 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 120.1% more rectangular screen area than Joy Plus.

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.