Bottom line: Which one is better?
Bottom line: HTC U12 is better than HTC U11.
HTC U12 is a better phone than HTC U11 because it has a better operating system; Android v8.0 (Oreo), compared to that of HTC U11 Android v7.1 (Nougat).
HTC U11 vs. HTC U12: DISPLAY
In review of HTC U11 vs. HTC U12, we note the following features in terms of display;
Resolution; HTC U11 has 1440 x 2560 pixels while HTC U12 has 1400 x 2880 pixels.
Pixel density; HTC U11 has 534ppi while HTC U12 has 562ppi.
Screen size; HTC U11 is 5.5” (13.97cm) while HTC U12 is 5.7” (14.48cm).
Screen protection; Both phones have Corning Gorilla Glass v5
Display type; HTC U11 has S-LCD 5 whereas HTC U12 has super AMOLED.
Touch screen; both phones are capacitive touchscreen multi-touch.
Bottom line: HTC U12 is a better device in display.
HTC U11 vs. HTC U12: PERFORMANCE
In terms of performance review of HTC U11 vs. HTC U12, the following features are evident;
Chipset; HTC U11 has Qualcomm snapdragon 835 MSM8998 while HTC U12 has Qualcomm snapdragon 845.
Graphics; HTC U11 has Adreno 540 while HTC U12 has Adreno 630
Processor; HTC U11 has octa (2.45 GHz, Quad core, Kryo 280 + 1.9 GHz, Quad core, Kryo 280) whereas HTC U12 has Octa core(2.8 GHz, Quad core, Kryo 385 + 1.8 GHz, Quad core, Kryo 385)
Architecture; both have 64 bit
RAM; both have 6GB
Bottom line: HTC U12 is slightly a better phone in performance.
HTC U11 vs. HTC U12: CAMERAS
Settings; both phones have exposure compensation, ISO control
Camera features; HTC U11 has Selfie Voice Command while HTC U12 has digital zoom, auto flash, face detection, smile detection, touch to focus
Image resolution; both phones have 4000×3000 pixels
Sensor; HTC U11 has back-illuminated sensor (BSI) while HTC U12 does not.
Shooting modes; both phones have continuous shooting, high dynamic range mode (HDR)
Resolution; Both phones have 16MP Front Camera.
Physical aperture; HTC U11 has F2.0 while HTC U12 does not.
Video recording; HTC U11 records at a speed of 1920×1080 @ 3fps while HTC U12 can record speeds of 384×216 fps and 1920×1080 fps.
Bottom line: HTC U11 is slightly a better phone than HTC U11 in terms of cameras.
HTC U11 vs. HTC U12: AUDIO
Loudspeaker; both phones loudspeakers
FM Radio; only available in HTC U12
Bottom line: HTC U12 is better in terms of audio.
HTC U11 vs. HTC U12: BATTERY
In terms of battery features of HTC U11 vs. HTC U12, we have the following reviews;
Battery power; HTC U11 has 3000mAh while HTC U12 has 3600 mAh.
Talk time; HTC U11 has up to 24.5hrs (4G)/ up to 24.5hrs (3G) while HTC U12 has up to 27hrs (4G)/27hrs (3G)
Both phones have a quick charging system
Type; HTC U11 has Li-ion whereas HTC U12 has Li-polymer
Bottom line: HTC U12 is superior in terms of battery.
HTC U11 vs. HTC U12: SPECIAL FEATURES
Both phones have front fingerprint sensor
Both phones have light sensor, proximity sensor, accelerometer, compass and gyroscope
Bottom line: both phones have similar special features
HTC U12 is slightly technological advanced compared to HTC U11.