Asus Zenfone 4 Pro ZS551KL vs Asus Zenfone Max Pro (M2) ZB631KL

HSDPA 800, 850, 900, 1700(AWS), 1800, 1900, 2100

HSDPA 850, 900, 2100

LTE frequency band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 17(700), 19(800), 20(800), 28(700), 38(2600), 39(1900), 40(2300), 41(2500) - Global, Taiwan; LTE frequency band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 12(700), 17(700), 18(800), 19(800), 20(800), 26(850), 28(700), 29(700), 30(2300), 38(2600), 39(1900), 41(2500) - US, Canada, Brazil; LTE frequency band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 12(700), 17(700), 18(800), 19(800), 20(800), 26(850), 28(700), 29(700), 30(2300), 38(2600), 39(1900), 40(2300), 41(2500) - India

LTE frequency band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 20(800), 40(2300)

-

LTE-A (3CA), Cat9, 450 Mbps download, 50 Mbps upload

LTE-A, (3CA) Cat12, 600 Mbps download, 150 Mbps upload

-

Yes

GPRS

2017-8

2018-12

2017-10

2018-12

-

Front glass, plastic body

Hybrid Dual SIM (Nano-SIM, dual stand-by)

Dual SIM (Nano-SIM, dual stand-by)

156.9 mm

157.9 mm

75.6 mm

75.5 mm

7.6 mm

8.5 mm

Moonlight white, Pure Black

Blue, Titanium

AMOLED capacitive touchscreen

IPS LCD capacitive touchscreen

5.5 inches

6.26 inches

1080 x 1920 pixels

1080 x 2280 pixels

401 ppi

403 ppi

Corning Gorilla Glass 5

Scratch resistant, 2.5D curved glass screen, Corning Gorilla Glass 6

Yes, max 10 fingers

Yes

Quad-core 2.45 GHz Kryo

Quad-core 2.2 GHz Kryo 260

quad-core 1.9 GHz Kryo

quad-core 1.8 GHz Kryo 260

Qualcomm MSM8998 Snapdragon 835

Qualcomm SDM660 Snapdragon 660

Adreno 540

Adreno 512

6 GB

3, 4, 6 GB

64, 128 GB

32, 64 GB

microSD(uses second SIM slot)

microSD, microSDHC, microSDXC

256 GB

512 GB

Android 7.1.1 (Nougat)

Android 8.1 Oreo

12 MP, f/1.7 , 25 mm, 2x optical zoom

12 MP, f/1.8 , 1/2.9" , 1.25 µm

16 MP, 50 mm

5 MP, f/2.4 , 1.12 µm

-

4000 x 3000 pixels

2160p@30fps, 1080p@30/60fps, 1080p@120fps, 720p@240fps

2160p@30fps, 1080p@30/60fps

laser/phase detection autofocus

-

4-axis optical image stabilization

-

-

phase detection autofocus

25mm (1/2.55" sensor size, 1.4 µm pixel size), 50mm (1/3.1" sensor size, 1.0 µm pixel size), geo-tagging, touch focus, face detection, HDR, panorama

Autofocus, continuous shooting, digital zoom, digital image stabilization, optical image stabilization, geotagging, panorama, HDR, touch focus, face detection, white balance settings, ISO settings, exposure compensation, self-timer, scene-mode, RAW

8 MP, f/1.9 , 22 mm, 1.4 µm

13 MP, f/2.0 , 26 mm, 1.12 µm

-

4160 x 3120 pixels

1080p

1080p@30fps

Yes, dual speakers

Yes

Vibration; MP3, WAV ringtones

-

-

Yes

-

FM Radio

FM radio

-

Wi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac

Wi-Fi 802.11b, 802.11g, 802.11n

Yes

-

Type-C reversible connector

microUSB 2.0

-

Yes

Yes

-

Yes

-

Yes

-

-

Yes

Yes

-

-

Yes

SMS(threaded view)

-

MMS

-

Email

-

IM

-

Push Email

-

No

-

Fingerprint (front-mounted), accelerometer, color spectrum, compass, gyro, proximity

Accelerometer, compass, fingerprint, gyroscope, light, proximity

Li-Ion

Li-Po

3600 mAh

5000 mAh

50% in 32 min

Yes

-

45 h

27 h 30 min

45 h

-

840 h

-

840 h

-

840 h