vivo X21i vs Xiaomi Mi 6

Compare recorded specifications, size and practical differences.

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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

    X21i:
    OLED
    Mi 6:
    LCD
  • Weight

    X21i: 9 g lighter

    X21i:
    159 g
    Mi 6:
    168 g
  • Width

    Mi 6: 4.5 mm narrower

    X21i:
    75 mm
    Mi 6:
    70.5 mm
  • Screen diagonal

    Mi 6: 1.13 in smaller diagonal

    X21i:
    6.28 in
    Mi 6:
    5.15 in
  • Chipset

    X21i:
    Mediatek MT6771 Helio P60 (12 nm)
    Mi 6:
    Qualcomm MSM8998 Snapdragon 835 (10 nm)
  • Depth

    X21i: 0.5 mm thinner

    X21i:
    7 mm
    Mi 6:
    7.5 mm

Physical size

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. X21i

    Height:
    154.4 mm +9.2 mm versus Mi 6
    Width:
    75 mm +4.5 mm versus Mi 6
    Depth:
    7 mm
  2. 2. Mi 6

    Height:
    145.2 mm
    Width:
    70.5 mm
    Depth:
    7.5 mm +0.5 mm versus X21i

Weight

Bars start at zero and share a scale within this chart.

  1. 1. X21i

    159 g

  2. 2. Mi 6

    168 g

    +9 g versus X21i

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. X21i

    Screen diagonal:
    6.28 in
    Aspect ratio (height:width):
    19:9
    Approximate rectangular screen area:
    98.4 cm²
  2. 2. Mi 6

    Screen diagonal:
    5.15 in
    Aspect ratio (height:width):
    16:9
    Approximate rectangular screen area:
    73.1 cm²

X21i has approximately 34.6% more rectangular screen area than Mi 6.

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.

X21i: Original memory entry

128 GB · 4 GB RAM 64 GB · 6 GB RAM

Mi 6: Original memory entry

64/128 GB · 6 GB RAM 64 GB · 512GB 4GB

Practical features

Explicit Yes and No values are shown directly. Qualified or regional records retain their details. Unknown means the record is missing.

1. X21i

NFC:
Unknown
Headphone jack:
Yes
Memory card support:
See details microSD · up to 256 GB (uses SIM 2 slot)

2. Mi 6

NFC:
Yes
Headphone jack:
No
Memory card support:
No

Battery capacity

Capacity is not battery life. No endurance test is implied.

Recorded battery capacity

Bars start at zero and share a scale within this chart.

  1. 1. X21i

    3425 mAh

    +75 mAh versus Mi 6

  2. 2. Mi 6

    3350 mAh

Specifications

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.

1. X21i2. Mi 6

Everyday essentials
Everyday essentials — specifications for X21i, Mi 6.
SpecificationX21iMi 6
Dimensions (HxWxD)
  • 154.4 Х 75 Х 7 mm
  • 145.2 Х 70.5 Х 7.5 mm
Weight
  • 159 g
  • 168 g
Technology
  • Super AMOLED
  • IPS LCD
Screen size
  • 6.28" inch
  • 5.15" inch
Screen resolution
  • 1080 x 2280 px
  • 1080 x 1920 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
  • 128 GB
  • 4 GB RAM 64 GB
  • 6 GB RAM
  • 64/128 GB
  • 6 GB RAM 64 GB
  • 512GB 4GB
Memory card support
  • microSD
  • up to 256 GB (uses SIM 2 slot)
  • No
Battery Capacity is not battery life. No endurance test is implied.
  • 3425 mAh
  • Non-removable Li-Ion
  • 3350 mAh
  • Non-removable Li-Po
Operating system OS
  • Android 8.1 (Oreo); Funtouch 4
  • Android 7.1.1 (Nougat); MIUI 8
Chipset
  • Mediatek MT6771 Helio P60 (12 nm)
  • Qualcomm MSM8998 Snapdragon 835 (10 nm)
NFC Unknown
  • Yes
Headphone jack
  • Yes
  • No
Display
Display — specifications for X21i, Mi 6.
SpecificationX21iMi 6
Touchscreen
  • capacitive touchscreen
  • capacitive touchscreen
Display colors
  • 16M
  • 16M
Screen area
  • 98.4 cm2
  • 73.1 cm2
Screen format
  • 19:9 (height:width)
  • 16:9 (height:width)
Screen to body ratio
  • 85.0%
  • 71.4%
PPI /points per inch/
  • 402 PPI
  • 428 PPI
Screen protection Unknown
  • Corning Gorilla Glass 4
Camera and Video
Camera and Video — specifications for X21i, Mi 6.
SpecificationX21iMi 6
Rear camera, main
  • 12 MP
  • Dual
  • 12 MP
  • Dual
Camera specs
  • 12 MP
  • f/1.8
  • 1/2.55''
  • 1.4µm
  • dual pixel PDAF -5 MP
  • f/2.0
  • depth sensor
  • 12 MP
  • f/1.8
  • 27mm (wide)
  • 1/2.9''
  • 1.25µm
  • 4-axis OIS
  • PDAF -12 MP
  • f/2.6
  • 52mm (telephoto)
  • 1.0µm
  • AF
  • 2x optical zoom
Functions
  • LED flash
  • HDR
  • panorama
  • Dual-LED dual-tone flash
  • HDR
  • panorama
Video
  • 1080p@30fps
  • 1080p@30fps
Front camera, selfie
  • 24 MP
  • Single
  • 8 MP
  • Single
Specifications
  • 24 MP
  • 8 MP
Performance

Scores marked * are historical catalogue entries. Test conditions are unspecified; no new testing is implied.

Performance — specifications for X21i, Mi 6.
SpecificationX21iMi 6
Processor CPU
  • Octa-core (4x2.0 GHz Cortex-A73 & 4x2.0 GHz Cortex-A53)
  • Octa-core (4x2.45 GHz Kryo & 4x1.9 GHz Kryo)
Graphics processor GPU
  • Mali-G72 MP3
  • Adreno 540
Antutu 7 score *
  • 130256
  • 205305
GeekBench 4 Single Core *
  • 1497
  • 1894
GeekBench 4 Multi-Core *
  • 5759
  • 6193
GeekBench 4 RenderScript * Unknown
  • 7657
Antutu 8 score * Unknown
  • 261141
GeekBench 4 Battery * Unknown
  • 3620
GeekBench 5 Single Core * Unknown
  • 368
GeekBench 5 Multi-Core * Unknown
  • 1463
General specs
General specs — specifications for X21i, Mi 6.
SpecificationX21iMi 6
Release date
  • 2018
  • May
  • 2017
  • April
Colors
  • Black
  • Aurora White
  • Ruby Red
  • Night Purple
  • Ceramic Black
  • Black
  • Blue
  • White
Historical recorded price Legacy catalogue value; date unknown. Not a current offer.
  • 430 EUR
  • 330 EUR
Body build Unknown
  • Front/back glass
  • stainless steel frame
Communication and Connectivity
Communication and Connectivity — specifications for X21i, Mi 6.
SpecificationX21iMi 6
SIM card
  • Hybrid Dual SIM (Nano-SIM
  • dual stand-by)
  • Dual SIM (Nano-SIM
  • dual stand-by)
Network
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 CDMA 800 & TD-SCDMA -3G - HSDPA 850 / 900 / 2100 -4G - LTE band 1(2100)
  • 3(1800)
  • 4(1700/2100)
  • 5(850)
  • 8(900)
  • 38(2600)
  • 39(1900)
  • 40(2300)
  • 41(2500)
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 -3G - HSDPA 850 / 900 / 1900 / 2100 -4G - LTE band 1(2100)
  • 3(1800)
  • 5(850)
  • 7(2600)
  • 8(900)
  • 38(2600)
  • 39(1900)
  • 40(2300)
  • 41(2500)
Speed
  • HSPA
  • LTE
  • HSPA 42.2/5.76 Mbps
  • LTE-A (3CA) Cat9 450/50 Mbps
GPRS
  • Yes
  • Yes
Edge
  • Yes
  • Yes
Wi-Fi
  • Wi-Fi 802.11 a/b/g/n/ac
  • dual-band
  • WiFi Direct
  • hotspot
  • Wi-Fi 802.11 a/b/g/n/ac
  • dual-band
  • Wi-Fi Direct
  • DLNA
  • hotspot
GPS
  • Yes
  • with A-GPS
  • GLONASS
  • Yes
  • with A-GPS
  • GLONASS
  • BDS
USB
  • microUSB 2.0
  • USB On-The-Go
  • Type-C 1.0 reversible connector
Bluetooth
  • 5.0
  • A2DP
  • LE
  • 5.0
  • A2DP
  • LE
Music and Audio
Music and Audio — specifications for X21i, Mi 6.
SpecificationX21iMi 6
Radio
  • FM radio
  • No
Others
  • 32-bit/192kHz audio -Active noise cancellation with dedicated mic
  • Active noise cancellation with dedicated mic
Other features
Other features — specifications for X21i, Mi 6.
SpecificationX21iMi 6
Dop
  • Sensors Fingerprint (rear-mounted)
  • accelerometer
  • proximity
  • compass - Fast battery charging
  • Sensors Fingerprint (front-mounted)
  • accelerometer
  • gyro
  • proximity
  • compass
  • barometer
  • Infrared port - Fast battery charging (Quick Charge 3.0) - Splash resistant - For Global market