Epson PowerLite 680 vs Optoma UHD51A comparison definitely makes sense. Based on our rating, PowerLite 680 has a total rating of 6.6 out of 10 versus 9.6 for UHD51A.
Advantages Epson PowerLite 680 over Optoma UHD51A
Better brightness: 3500 vs 2400 lumens
Longer lamp life (normal mode): 5000 vs 4000 hours
More HDMI connectors: 3 vs 2
Advantages Optoma UHD51A over Epson PowerLite 680
Bring the cinematic 4K UHD experience home with the UHD51A
Bigger projection screen size: 30-300 inch vs 55-100 inch