Asus Zenfone 4 Pro ZS551KL vs Realme X2

GSM 850, 900, 1800, 1900

GSM 850, 900, 1800, 1900; CDMA 800 & TD-SCDMA

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

HSDPA 850, 900, 1900, 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), 4(1700/2100), 5(850), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500)

5.76 Mbps

11.5 Mbps

-

LTE Cat13, Cat15

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

-

2017-10

2019-9

2017-8

2019-9

-

Front/back glass, plastic frame

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

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

156.9 mm

158.7 mm

75.6 mm

75.2 mm

7.6 mm

8.6 mm

175 g

182 g

Moonlight white, Pure Black

Blue, White

AMOLED capacitive touchscreen

Super AMOLED capacitive touchscreen

5.5 inches

6.4 inches

1080 x 1920 pixels

1080 x 2340 pixels

401 ppi

403 ppi

Corning Gorilla Glass 5

Scratch resistant, Corning Gorilla Glass 5

Yes, max 10 fingers

Yes

Quad-core 2.45 GHz Kryo

Dual-core 2.2 GHz Kryo 470 Gold

quad-core 1.9 GHz Kryo

Hexa-core 1.8 GHz Kryo 470 Silver

Qualcomm MSM8998 Snapdragon 835

Qualcomm SDM730 Snapdragon 730G

Adreno 540

Adreno 618

6 GB

6, 8 GB

64, 128 GB

64, 128, 256 GB

microSD(uses second SIM slot)

microSD, microSDHC, microSDXC

-

UFS 2.1

Android 7.1.1 (Nougat)

ColorOS 6 (Android 9.0 Pie)

Dual

Quad

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

64 MP, f/1.8 , 1/1.7" , 0.8 µm

16 MP, 50 mm

8 MP, 13 mm, f/2.3 , 1/4" , 1.12 µm

2 MP, f/2.4 , 1/5" , 1.75 µm

2 MP, f/2.4 , 1/5" , 1.75 µm

-

9280 x 6944 pixels

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

2160p@30fps, 1080p@30/60/120fps, 720p@960fps, gyro-EIS

laser/phase detection autofocus

-

4-axis optical image stabilization

-

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, macro mode, phase detection

8 MP, f/1.9 , 22 mm, 1.4 µm

32 MP, f/2.0

-

6528 x 4896 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 802.11a, 802.11b, 802.11g, 802.11n, 802.11n 5Ghz, 802.11ac

-

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, geomagnetic, gyroscope, proximity

Li-Ion

Li-Po

3600 mAh

4000 mAh

50% in 32 min

VOOC Flash Charge 3.0 (67% in 30 min)

27 h 30 min

-

-

230 USD