Okay, here goes. I could not get them both on the screen at the same time and be fair to either one, the shadow from the masking made it impossible to do.
So what I did was get both projectors lined up, set to 6500k, Theater Black 1 mode, Auto Iris OFF. I got them centered on the screen, put the tripod in place, and then took identical shots by just putting a dvd case in front of the lens of the one I wasn't shooting. So they are exactly the same frame from exactly the same spot.
And these shots were taken from 3 feet and 4 feet from the screen. Yes, I said 3 and 4 feet from a 106" screen with a BluRay set to output 1080i. I won't tell you which is which yet, but i promise that out of each pair, one is the 1080p and one is the 720p.
*any moire (wavy line pattern) is a function of the camera and is not on the image on the screen* And ignore the shadow of the tripod in the second shot, I couldn't move it if I wanted to give you an exact duplicate spot.
So everyone who tells me there's a "drastic" difference in detail
between a 1080p and a 720p pj on high quality material, tell me which is which? Well, the SDE will give it away. But I challenge you to find more detail.