amaze xl camera
Here are specs for Amaze One XL camera:
8 megapixel camera with auto focus, smart LED flash, and BSI sensor (for better low-light captures)
F2.0 aperture and 28mm lens
1080p HD video recording
Dedicated imaging chip
Capture a photo in the midst of recording HD video
Auto flash smartly determined by distance from your subject
Single LED flash
Video stabilization feature removes annoying, shaky motion
High quality slow motion video capture and playback
Simultaneous video-photo capture.
It uses a BSI sensor whose manufacturer I did not learn.
Here are specs for Amaze 4G camera:
8mp auto-focus, dual-LED flash, BSI sensor
F2.2 and 28mm lens
No smart flash
2 LED flash
No simultaneous video-photo capture
Even not knowing who makes the BSI sensor in the One XL, and even though it is single instead of dual LED flash, I would probably prefer to have the camera of the One XL in my Amaze.
The Amaze had the "Best" camera on a smartphone at the time, and the One XL has the same pixel-count besides another similar set of features, but improves physically with the F2.0 aperture alone.
Considering that it lets in more light, has slo-mo and the ability to capture photos while videoing, I would prefer to have that camera in my Amaze. I was VERY pleased with Amaze ability, and would probably be even more pleased with XL ability. Lack of one LED for flash, and the possibility that it is a newer-gen sensor is a gamble I'd take. But XL doesn't support the 1700 band that most of T-mo's network needs for 4G.
We don't know the LED spec or the sensor specs, thus don't know what difference 1 or 2 LED's will make. I personally would prefer the newer camera, EXCEPT, I would not want to switch from the 8mp I currently have to the 4mp of the HTC One unless camera samples showed it to be in all cases remarkably superior.
You can google around for camera samples, and decide suits you.