It makes sense comparing ViewSonic PA503S vs ViewSonic M1 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 5.3 for M1.
Advantages ViewSonic PA503S over ViewSonic M1
Bigger projection screen size: 30-300 inch vs 24-100 inch
Better brightness: 3600 vs 250 lumens
Advantages ViewSonic M1 over ViewSonic PA503S
Lower noise level, 32 dB vs 34 dB
Lower power consumption, 55 W vs 260 W
Longer lamp life (normal mode): 30000 vs 5000 hours