The BenQ TH671ST vs Optoma HD142X comparison shows that these projectors have some important differences and common features. Based on our rating, both projectors have the same overall rating of 7.3.
Advantages Optoma HD142X over BenQ TH671ST
Lower noise level, 28 dB vs 33 dB
Lower power consumption, 260 W vs 355 W
3D support
Longer lamp life (normal mode): 5000 vs 4000 hours