I just did an 1100 and have done a few 600s. The on/off CR of the 1100 measured better, almost splitting the difference between the 600 and the JVCs. It was capable of tons of light output, but it was projecting onto a 6.0 rated gain SilverStar screen, so much of that might be thanks to the screen.
I don’t remember anything else besides CR that might make a visible improvement with 1080P.
3D didn’t measure well, being very warm when looking through the activated glasses.