It makes sense comparing Epson 3100 vs ViewSonic PX747-4K because they both are able to give some premium features. Based on our rating, 3100 has a total rating of 7 out of 10 versus 7.3 for PX747-4K.
Advantages Epson 3100 over ViewSonic PX747-4K
Lower noise level, 24 dB vs 27 dB
3D support
Advantages ViewSonic PX747-4K over Epson 3100
Bring the cinematic 4K UHD experience home with the PX747-4K
Bigger projection screen size: 60-200 inch vs 40-200 inch
Better brightness: 3500 vs 2600 lumens
Lower power consumption, 310 W vs 356 W
PX747-4K is HDR-compatible
Longer lamp life (normal mode): 4000 vs 3500 hours