True, the Epson has slight "screen door effect" from pixel fill but you'll only see it if you're within 3 feet of the screen and looking for it so it's basically not an issue.
My friend has the BenQ and I have the Epson, we both agree both PJ's are a great value for the price point. Slight advantages with each but both are great entry level projectors. That said, the BenQ has out-sold the Epson but has also been out longer.
I looked at the BenQ myself but I am sensitive to RBE so single wheel DLP is not for me. The Epson was less expensive and 3LCD so was the wiser choice. I've been very happy with my Epson and no regrets. Games, movies, 3D all look fantastic on it.
As for lamps, the BenQ is rated at 3K-5K hours depending on which mode you use, the Epson is 5K-6K, slight advantage Epson. Projector warranty is 1 year BenQ, 2 Years Epson.
So again, you'll win with either one. Just depends on your environment, where you're going to mount the projector and how much money you want to spend. Projector Central has great reviews and details on both, might want to check there and do a little more research before making a decision. GL
Sony HW40es Projector / 114" screen
Sony 70" W830B LED TV
PS4 GT: Ringo619
Xbox One GT: JonnyRingo619