Bottom line: Which one is better?
In this review of M1 vs M2, Asus Zenfone Max (M1) is better as it has higher pixel density, high battery power, newer Bluetooth version, 128GB expandable memory, faster GPU speed, higher resolution and higher pixel density.
DESIGN
Dimensions; Asus Max (M2) has 158.4 x 76.3 x 7.7 mm whereas Asus Max (M1) is 159 x 76 x 8.5 mm
Weight; Asus Max (M2) is 160g while Asus Max (M1) is 180g
DISPLAY
Type; both phones have IPS LCD capacitive touchscreen
Screen size; Asus Max (M2) is 6.26” while Asus Max (M1) is 5.99”
Resolution; Asus Max (M2) has 720 x 1520px while Asus Max (M1) has 1080 x 2160px
Pixel density; Asus Max (M2) has 269ppi while Asus Max (M1) has 404ppi
HARDWARE & PERFORMANCE
Chipset; Asus Max (M2) has Qualcomm SDM632 Snapdragon 632 (14nm) while Asus Max (M1) has Qualcomm SDM636 Snapdragon 636 (14nm).
CPU; Asus Max (M2) has Octa-core (4×1.8GHz Kryo 250 Gold & 4×1.8GHz Kryo 250 Silver whereas Asus Max (M1) has Octa-core 1.8GHz kryo 260
GPU; Asus Max (M2) has Adreno 506 while Asus Max (M1) has Adreno 509
Expandable memory; Asus Max (M2) and Asus Max (M1) have up to 1TB
Internal; Asus Max (M2) has 32GB 3GB RAM, 64GB 4GB RAM whereas Asus Max (M1) has 32GB 3GB RAM, 64GB 4GB RAM, 128GB 6GB RAM.
CAMERA
Main camera; Asus Max (M2) and Asus Max (M1) have 13MP
Physical aperture; Asus Max (M2) has F1.8 while Asus Max (M1) has F2.2
Features; Asus Max (M2) and Asus Max (M1) have LED flash, HDR and panorama.
Video; Asus Max (M2) has 2160p@30fps, 1080p@30fps whereas Asus Max (M1) has 2160p@30fps, 1080p@30/60fps
Front camera; Asus Max (M2) and Asus Max (M1) have 8MP
Aperture size; Asus Max (M2) has F2.0 while Asus Max (M1) has F2.2
Features; Asus Max (M2) has LED flash, HDR while Asus Max (M1) has LED flash
Video; both phones have 1080p@30fps
AUDIO
Loudspeaker; both phones have loudspeakers
FM radio; both phones have FM radios
Audio jack; the two phones have 3.5mm audio jacks
BATTERY
Capacity; Asus Max (M2) has 4000mAh while Asus Max (M1) has 5000mAh
CONNECTIVITY & FEATURES
Wi-Fi; both phones have 802.11 b/g/n
Bluetooth; Asus Max (M2) has 4.2 while Asus Max (M1) has 5.0
GPS; both phones have GPS with A-GPS
NFC; Asus Max (M1) has NFC
Sensors; the two phones have fingerprint, accelerometer, gyro, proximity and compass. Asus Max (M1) has light sensor.
Asus Max (M1) is a better smartphone in this review as it has great useable features than Asus Max (M2).

