It makes sense comparing Optoma X600 vs ViewSonic PX747-4K because they both are able to give some premium features. Based on our rating, X600 has a total rating of 7 out of 10 versus 7.3 for PX747-4K.
Advantages Optoma X600 over ViewSonic PX747-4K
Bigger projection screen size: 23-300 inch vs 60-200 inch
Better brightness: 6000 vs 3500 lumens
3D support
Advantages ViewSonic PX747-4K over Optoma X600
Bring the cinematic 4K UHD experience home with the PX747-4K
Lower noise level, 27 dB vs 28 dB
Lower power consumption, 310 W vs 380 W
PX747-4K is HDR-compatible
Longer lamp life (normal mode): 4000 vs 2500 hours