Asus Zenfone 4 Pro ZS551KL vs Realme X2 Pro

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

-

2017-8

2019-10

2017-10

2019-10

-

Aluminium alloy, glass

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

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

156.9 mm

161 mm

75.6 mm

75.7 mm

7.6 mm

8.7 mm

175 g

199 g

Moonlight white, Pure Black

Blue, Cement, Luna, Red

AMOLED capacitive touchscreen

Super AMOLED capacitive touchscreen

5.5 inches

6.5 inches

1080 x 1920 pixels

1080 x 2400 pixels

401 ppi

402 ppi

Corning Gorilla Glass 5

Scratch resistant, 2.5D curved glass screen, Corning Gorilla Glass 5

Yes, max 10 fingers

Yes

Quad-core 2.45 GHz Kryo

Single-core 2.96 GHz Kryo 485

quad-core 1.9 GHz Kryo

Triple-core 2.42 GHz Kryo 485

Quad-core 1.8 GHz Kryo 485

Qualcomm MSM8998 Snapdragon 835

Qualcomm SDM855 Snapdragon 855+

Adreno 540

Adreno 640

6 GB

6, 8, 12 GB

64, 128 GB

64, 128, 256 GB

microSD(uses second SIM slot)

No

256 GB

-

-

UFS 2.1/UFS 3.0

Android 7.1.1 (Nougat)

ColorOS 6.1 (Android 9.0 Pie)

Dual

Quad

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

64 MP, f/1.8 , 2x optical zoom , 1/1.7" , 0.8 µm

16 MP, 50 mm

13 MP, f/2.5 , 1/3.4" , 1.0 µm

8 MP, f/2.2 , 13 mm, 1/3.2" , 1.4 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@30/60fps, 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, optical zoom, digital image stabilization, geotagging, panorama, HDR, touch focus, face detection, white balance settings, ISO settings, exposure compensation, self-timer, scene-mode, macro mode

-

99

-

86

-

95

8 MP, f/1.9 , 22 mm, 1.4 µm

16 MP, f/2.0 , 1 µm

-

4640 x 3488 pixels

1080p

1080p@30fps

-

74

-

74

-

74

Yes, dual speakers

Yes, with stereo speakers

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, gyroscope, light, proximity

Li-Ion

Li-Po

3600 mAh

4000 mAh

50% in 32 min

SuperVOOC Flash Charge (100% in 35 min)

27 h 30 min

-

-

420 USD