HTC at it's second peak.
Weirdly they later released the butterfly 2 and desire eye, which while plastic actually had better specs, in terms of camera and water resistance!
In other words HTC had a common template/platform for its 2014 phones, beginning with the M8
-One e8: plastic unibody, 13mp camera without depth sensor, no USB OTG or IR blaster
-One M8 with windows phone
-One M8 eye with 13mp camera, no IR blaster
-Butterfly 2. Plastic unibody, 13mp camera and depth sensor, IR blaster, IP57 water resistance (originally made for AU by KDDI in Japan)
-Desire eye (dual 13mp cameras, 5.2" screen, IP57 water resistance, no depth sensor)