It makes sense comparing ViewSonic PA503S vs ViewSonic PX747-4K because they both are able to give some premium features. Based on our rating, PA503S has a total rating of 5.6 out of 10 versus 7.3 for PX747-4K.
Advantages ViewSonic PA503S over ViewSonic PX747-4K
Bigger projection screen size: 30-300 inch vs 60-200 inch
Better brightness: 3600 vs 3500 lumens
Lower power consumption, 260 W vs 310 W
Longer lamp life (normal mode): 5000 vs 4000 hours
Advantages ViewSonic PX747-4K over ViewSonic PA503S
Bring the cinematic 4K UHD experience home with the PX747-4K