TECNO Phantom 8 vs vivo Y91 (Mediatek)

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

  Y91 (Mediatek): 21.5 g lighter

  Phantom 8:

  185 g

  Y91 (Mediatek):

  163.5 g

• Width

  Y91 (Mediatek): 4.4 mm narrower

  Phantom 8:

  79.5 mm

  Y91 (Mediatek):

  75.1 mm

• Screen diagonal

  Phantom 8: 0.52 in smaller diagonal

  Phantom 8:

  5.7 in

  Y91 (Mediatek):

  6.22 in

• Memory variants

  At 64 GB storage

  Phantom 8:

  6 GB RAM

  Y91 (Mediatek):

  3 GB RAM

• Chipset

  Phantom 8:

  Mediatek MT6757T Helio P25 (16 nm)

  Y91 (Mediatek):

  Mediatek MT6762 Helio P22 (12 nm)

• Height

  Y91 (Mediatek): 4.9 mm shorter

  Phantom 8:

  160 mm

  Y91 (Mediatek):

  155.1 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. Phantom 8

   Height:

   160 mm +4.9 mm versus Y91 (Mediatek)

   Width:

   79.5 mm +4.4 mm versus Y91 (Mediatek)

   Depth:

   7.9 mm

2. 2. Y91 (Mediatek)

   Height:

   155.1 mm

   Width:

   75.1 mm

   Depth:

   8.3 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. Phantom 8

   Screen diagonal:

   5.7 in

   Aspect ratio (height:width):

   16:9

   Approximate rectangular screen area:

   89.6 cm²

2. 2. Y91 (Mediatek)

   Screen diagonal:

   6.22 in

   Aspect ratio (height:width):

   19:9

   Approximate rectangular screen area:

   96.6 cm²

Y91 (Mediatek) has approximately 7.8% more rectangular screen area than Phantom 8.

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.