I've seen several different ones both commercially and in a couple private showrooms (Christi's, Sim2's), there is no way to tell that much about it unless I spent time with it myself in my own room, but I do know on some of those they were so bright that the contrast was nullified somewhat (hence with DLP's the brighter ones lose contrast due to a limitation of the technology). I've seen a bunch of various high-end PJ's all over Dallas in some showrooms and various places, as well as some in Colorado. However, I didn't do much if any critical viewing other than a couple time, as I wasn't looking to buy one myself. I actually thought the Sony4k looked better in a way (more film like at least), which I saw in a movie theater in Colorado (in Colo Springs). I watched Super8 on the Sony4k, and even though the movie wasn't great, I went to see it on a commercial DLP to try to compare the same day (I had time to kill and nothing to do). Super8 was probably a bad movie to compare because parts of the movie were heavily filtered or whatever to give a more film ("Super8") look, at first I actually thought the Sony4k projector was broken until the movie played some cleaner scenes
It's hard to compare in a movie theater because the projectors have too many lumens and not enough contrast, but even outside the theater I've never seen a DLP that I thought just blew away my JVC in movies, and that includes Runcos and others. Perhaps if I had a super high-end DLP in my own room I would change my mind, but I kind of doubt it. Keep in mind that anyone can find a Sony4k and a Christi just by going to the local theater, a lot of theaters are really bad, but there are a few good ones with better setups and to where the lighting on the side isn't reflecting as much (which is really annoying).
In these viewings, sharpness was a non-issue between these high-end DLP's and modern LCOS projectors (at least to me), the movies were not sharp enough to make a difference, that's why I would need it in my own room to tell and A/B. Tree of life is a good movie to compare projectors on (it has super dark high contrast scenes, scenes filmed with neutral D65 lighting, and it has some scenes that show off sharpness, like billowing clouds of smoke). If I had to just take one movie to use as a comparison, it probably would be Tree of Life, but having a Harry Potter movie handy is good for further dark scene comparisons as well. There might be a better movie to use other than TOL (there is also Art of Flight which some like), but for now I use TOL.
Perhaps at Cedia they are setup well and you can go there and compare.