It makes sense comparing ViewSonic PA503X vs ViewSonic M1 because they both are able to give some premium features. Based on our rating, PA503X has a total rating of 6.6 out of 10 versus 5.3 for M1.
Advantages ViewSonic PA503X over ViewSonic M1
Bigger projection screen size: 30-300 inch vs 24-100 inch
Better brightness: 3600 vs 250 lumens
3D support
Advantages ViewSonic M1 over ViewSonic PA503X
Lower power consumption, 55 W vs 260 W
Longer lamp life (normal mode): 30000 vs 5000 hours