Optoma GT1080Darbee vs ViewSonic PA503S comparison definitely makes sense. Based on our rating, GT1080Darbee has a total rating of 6.6 out of 10 versus 5.6 for PA503S.
Advantages Optoma GT1080Darbee over ViewSonic PA503S
Bigger projection screen size: 45-303 inch vs 30-300 inch
Lower noise level, 30 dB vs 34 dB
3D support
More HDMI connectors: 2 vs 1
Advantages ViewSonic PA503S over Optoma GT1080Darbee