It makes sense comparing Optoma GT5600 vs BenQ HT1075 because they both are able to give some premium features. Based on our rating, GT5600 has a total rating of 8 out of 10 versus 7.3 for HT1075.
Advantages Optoma GT5600 over BenQ HT1075
Better brightness: 3600 vs 2200 lumens
Lower noise level, 25 dB vs 31 dB
Lower power consumption, 285 W vs 353 W
Longer lamp life (normal mode): 4000 vs 3500 hours
More USB ports: 2 vs 1
Advantages BenQ HT1075 over Optoma GT5600
Bigger projection screen size: 40-235 inch vs 80-100 inch