It makes sense comparing Optoma GT1080Darbee vs ViewSonic PX747-4K because they both are able to give some premium features. Based on our rating, GT1080Darbee has a total rating of 6.6 out of 10 versus 7.3 for PX747-4K.
Advantages Optoma GT1080Darbee over ViewSonic PX747-4K
Bigger projection screen size: 45-303 inch vs 60-200 inch
Lower power consumption, 262 W vs 310 W
3D support
Longer lamp life (normal mode): 5000 vs 4000 hours
Advantages ViewSonic PX747-4K over Optoma GT1080Darbee
Bring the cinematic 4K UHD experience home with the PX747-4K