It makes sense comparing BenQ HT3050 vs ViewSonic PX747-4K because they both are able to give some premium features. Based on our rating, both projectors have the same overall rating of 7.3.
Advantages BenQ HT3050 over ViewSonic PX747-4K
3D support
Stereo sound vs mono from integrated speakers
Advantages ViewSonic PX747-4K over BenQ HT3050
Bring the cinematic 4K UHD experience home with the PX747-4K
Bigger projection screen size: 60-200 inch vs 60-180 inch
Better brightness: 3500 vs 2000 lumens
Lower noise level, 27 dB vs 29 dB
Lower power consumption, 310 W vs 330 W
PX747-4K is HDR-compatible
Longer lamp life (normal mode): 4000 vs 3500 hours