It makes sense comparing Epson PowerLite 680 vs Optoma UHL55 because they both are able to give some premium features. Based on our rating, PowerLite 680 has a total rating of 6.6 out of 10 versus 9 for UHL55.
Advantages Epson PowerLite 680 over Optoma UHL55
Better brightness: 3500 vs 1500 lumens
More HDMI connectors: 3 vs 2
Advantages Optoma UHL55 over Epson PowerLite 680
Bring the cinematic 4K UHD experience home with the UHL55
Bigger projection screen size: 30-200 inch vs 55-100 inch
Lower noise level, 28 dB vs 35 dB
Lower power consumption, 170 W vs 373 W
UHL55 is HDR-compatible
3D support
Wireless connection enabled
Longer lamp life (normal mode): 20000 vs 5000 hours