It makes sense comparing Optoma HD27HDR vs Optoma UHL55 because they both are able to give some premium features. Based on our rating, HD27HDR has a total rating of 8 out of 10 versus 9 for UHL55.
Advantages Optoma HD27HDR over Optoma UHL55
Bigger projection screen size: 28-305 inch vs 30-200 inch
Better brightness: 3400 vs 1500 lumens
Lower noise level, 26 dB vs 28 dB
Advantages Optoma UHL55 over Optoma HD27HDR
Bring the cinematic 4K UHD experience home with the UHL55
Lower power consumption, 170 W vs 236 W
Wireless connection enabled
Longer lamp life (normal mode): 20000 vs 6000 hours