It makes sense comparing Optoma HD29Darbee vs Epson PowerLite 1781W because they both are able to give some premium features. Based on our rating, both projectors have the same overall rating of 7.
Advantages Optoma HD29Darbee over Epson PowerLite 1781W
Bigger projection screen size: 30-300 inch vs 50-150 inch
Lower noise level, 29 dB vs 39 dB
Lower power consumption, 264 W vs 309 W
3D support
Longer lamp life (normal mode): 5000 vs 4000 hours
More HDMI connectors: 2 vs 1
Stereo sound vs mono from integrated speakers
Advantages Epson PowerLite 1781W over Optoma HD29Darbee