Xiaomi Mi 3 vs Xiaomi Mi 4: Winners and sinners

Displays

Both the Xiaomi Mi 3 and Mi 4 use 5" IPS displays of identical 1080p resolution and a standard RGB matrix.

Although identical in specs and pixel arrangement, the screens posted different image quality and sunlight legibility results.

The display on the Xiaomi Mi 3 is bright enough at 100% with good contrast and colors. Unfortunately, dropping the brightness reduces the contrast and the screen becomes quite dim, which may as well mean the brightness scrubber isn't precise enough.

To make it worse, the screen brightness is quite uneven, with the backlight source pretty visible at the top. When you have a white page opened on screen you can easily notice the gradual brightness falloff from top to bottom. On the positive side, that's only visible with a full-on white or gray screen - in any other case it's barely visible.

The display on the Xiaomi Mi 4 has a higher maximum brightness level in comparison, while retaining the same good contrast and colors. The Mi 4's screen backlighting is much more consistent, too.

The sunlight legibility of the Xiaomi Mi 3's display isn't great, but the phone is reasonably usable outdoors. The sunlight legibility has been notably improved on the Mi 4 and the display performs admirably outdoors.

Sunlight contrast ratio

• Nokia 808 PureView
  4.698
• Apple iPhone 5
  3.997
• Samsung Galaxy Note 3
  3.997
• Samsung Galaxy K zoom
  3.675
• Apple iPhone 5s
  3.565
• Samsung Galaxy S5
  3.549
• Alcatel Idol X+
  3.527
• Apple iPhone 5c
  3.512
• Samsung Galaxy Alpha
  3.509
• Samsung Galaxy Note 3 Neo
  3.487
• Motorola RAZR MAXX
  3.42
• Samsung I9300 Galaxy S III
  3.419
• Nokia Lumia 925
  3.402
• Gionee Elife S5.5
  3.386
• Samsung I9505 Galaxy S4
  3.352
• Samsung Omnia W
  3.301
• Samsung Galaxy S5 mini
  3.174
• Samsung I9000 Galaxy S
  3.155
• Samsung Ativ S
  3.129
• Samsung I9190 Galaxy S4 mini
  3.127
• Samsung Galaxy S4 zoom
  3.118
• Nokia N9
  3.069
• Samsung Galaxy Note
  2.97
• Samsung Galaxy Premier
  2.958
• Sony Xperia Z1
  2.95
• HTC One S
  2.901
• Samsung I8730 Galaxy Express
  2.861
• BlackBerry Q10
  2.856
• Samsung I9100 Galaxy S II
  2.832
• Samsung Galaxy S II Plus
  2.801
• BlackBerry Z30
  2.79
• Sony Xperia ZR
  2.672
• Huawei Ascend P1
  2.655
• Nokia Lumia 900
  2.562
• HTC One Max
  2.537
• Nokia Lumia 720
  2.512
• HTC One
  2.504
• Motorola Moto G
  2.477
• Sony Xperia Z
  2.462
• Xiaomi Mi 4
  2.424
• Samsung Galaxy S III mini
  2.422
• LG G Flex
  2.407
• HTC One (M8)
  2.371
• Motorola RAZR i
  2.366
• Sony Xperia ZL
  2.352
• Samsung Galaxy Note II
  2.307
• Oppo Find 7a
  2.279
• Alcatel One Touch Hero
  2.272
• Apple iPhone 4S
  2.269
• HTC Desire 600 dual sim
  2.262
• Nokia Asha 311
  2.25
• LG Nexus 5
  2.228
• Nokia Lumia 820
  2.193
• HTC One (E8)
  2.185
• Nokia Lumia 920
  2.17
• HTC One X
  2.158
• Nokia N8
  2.144
• Nokia Lumia 620
  2.142
• Nokia 515
  2.134
• HTC Desire 500
  2.129
• Sony Xperia acro S
  2.119
• Nokia Lumia 1020
  2.103
• Oppo Find 5
  2.088
• Sony Xperia SL
  2.078
• Nokia Lumia 630
  2.056
• BlackBerry Z10
  2.051
• Samsung I9295 Galaxy S4 Active
  2.022
• Apple iPhone 4
  2.016
• HTC One mini
  2.003
• Xiaomi Mi 3
  2.001
• Huawei Ascend P7
  1.992
• LG G2
  1.976
• Oppo R819
  1.957
• Sony Ericsson Xperia ray
  1.955
• Sony Xperia Z2
  1.944
• Nokia Lumia 1320
  1.941
• HTC One mini 2
  1.94
• Samsung Galaxy Camera
  1.938
• Sony Xperia J
  1.932
• Acer CloudMobile S500
  1.931
• LG Nexus 4
  1.926
• LG G Pro 2
  1.922
• Samsung Galaxy Mega 6.3
  1.913
• Nokia Asha 308
  1.911
• Sony Xperia T
  1.894
• HTC Desire X
  1.878
• HTC Butterfly
  1.873
• HTC Windows Phone 8X
  1.873
• HTC Butterfly S
  1.867
• Huawei Ascend P6
  1.865
• Huawei Ascend Mate
  1.845
• LG G2 mini
  1.838
• LG G3
  1.82
• Nokia Lumia 1520
  1.813
• HTC Desire 616 dual sim
  1.797
• Sony Xperia V
  1.792
• HTC Desire 816
  1.783
• Sony Xperia Z1 Compact
  1.772
• HTC Desire 700 dual sim
  1.769
• Sony Xperia U
  1.758
• Meizu MX3
  1.754
• LG Optimus G
  1.753
• Sony Xperia T2 Ultra
  1.74
• Sony Xperia SP
  1.733
• LG Optimus 4X HD
  1.691
• Oppo Find 7
  1.691
• HTC One V
  1.685
• BlackBerry Q5
  1.682
• LG Optimus Vu
  1.68
• Xiaomi Mi Pad 7.9
  1.672
• LG Optimus GJ
  1.666
• LG Optimus 3D Max
  1.658
• HTC Desire V
  1.646
• Samsung Galaxy Xcover 2
  1.632
• Samsung Galaxy Ace 3
  1.622
• Jolla Jolla
  1.605
• Sony Xperia Z Ultra
  1.578
• Sony Xperia go
  1.577
• Samsung Galaxy Ace 2 I8160
  1.566
• Samsung Galaxy Core
  1.563
• LG Optimus G Pro
  1.552
• Motorola Moto E
  1.545
• LG Optimus 3D
  1.542
• Nokia Asha 302
  1.537
• BlackBerry Curve 9320
  1.488
• Sony Xperia M
  1.473
• Oppo N1
  1.47
• Meizu MX 4-core
  1.462
• Nokia Lumia 610
  1.432
• Samsung Galaxy S Duos
  1.4
• Sony Xperia M2
  1.393
• Samsung Galaxy Grand Neo
  1.393
• Samsung Galaxy Grand 2
  1.38
• Sony Xperia E1
  1.372
• Nokia Lumia 625
  1.371
• Gigabyte GSmart G1355
  1.361
• Sony Xperia L
  1.351
• Samsung Galaxy Mega 5.8
  1.35
• Sony Xperia miro
  1.324
• Samsung I9082 Galaxy Grand
  1.321
• Samsung I8530 Galaxy Beam
  1.315
• HTC Desire C
  1.3
• Nokia X
  1.291
• Sony Xperia C
  1.283
• Nokia Asha 503
  1.281
• Nokia Asha 501
  1.27
• LG Optimus L7
  1.269
• Nokia Lumia 510
  1.268
• Samsung Galaxy Fame
  1.245
• LG Optimus L9
  1.227
• Meizu MX
  1.221
• Samsung Galaxy Young
  1.22
• Sony Xperia E
  1.215
• Nokia XL
  1.204
• Sony Xperia E dual
  1.203
• Samsung Galaxy Pocket
  1.18
• Nokia Asha 305
  1.178
• Nokia Asha 306
  1.175
• Sony Xperia neo L
  1.169
• Sony Xperia tipo
  1.166
• Nokia Lumia 520
  1.161
• Samsung S6802 Galaxy Ace Duos
  1.148
• Samsung Galaxy mini 2
  1.114

Winner: Xiaomi Mi 4. While its size and resolution are the same as on the Mi 3, the image quality and performance in varying conditions is clearly superior.

Connectivity

Both phones are powered by Qualcomm chipsets and enjoy the rich connectivity benefits that come with it. There's quad-band 3G each with 42.2Mbps of download and 5.76Mbps of upload speed courtesy of HSPA. The Mi 3 omits LTE, while the Xiaomi Mi enjoys the fastest mobile data around with Cat. 4 LTE (up to 150Mbps down and 50Mbps up).

Local connections are blazing fast as well thanks to dual-band Wi-Fi 802.11ac (a/b/g/n are supported too). Bluetooth 4.0 is available for connecting with accessories including low-power devices like wearables.

NFC is available only on the Xiaomi Mi 3. Xiaomi research found less than 1% of its users actually use NFC, explaining its absence on the latest Mi 4.

On the other hand, the Xiaomi Mi 4 comes with an IR blaster. With the right application you can turn your Xiaomi Mi 4 into a universal remote control for many household appliances.

Wired connectivity is where the two flagships differ even more. While both support USB OTG, the Xiaomi Mi 4 has an MHL-enabled microUSB 2.0 port, which means it can, with the right adapter, output HD video.

Both the Mi 3 and Mi 4 feature an FM radio.

Winner: Xiaomi Mi 4. We can forgive the lack of NFC - Xiaomi did make up for it with blazing fast LTE connectivity, an MHL-enabled USB port and an IR blaster. The Mi 3 looks like the right chioce in regions with no 4G network but you should consider the absence of a wired TV-out option.