Yep, seen the N7, NX9, 760 , Z1 9900, 7900, all in one go. The Sony had a very nice and shapr image but I do know what to look for to srutinise the image so JVC won every time especially when looking at PQ as a whole yet for the average consumer put on a nice and bright HDR source and they may say the Sony is better, just like in store shop floor where the TVs are set to display mode.I can tell you in an objective sense that this is not true. Pull up any single pixel test pattern and it will clearly show the deficiencies I outlined above. All 4K SXRD projectors have this inherent flaw, though as I've mentioned, it's better than it used to be, but still there unfortunately. The problem is that they cannot map discreet pixel information found in the source to every pixel displayed on screen simultaneously. Because of this, there is a slight loss of digital resolution and image bit depth. And if you don't enable game mode, there is noise reduction as well that can't be turned off. This has the potential to wipe away film grain. I suspect this is why some feel the JVC's image is noisier, but that's only because it's showing all that's in the source, be it good or bad. The JVC models do not suffer these same problems. This is not bias towards JVC, it's simply the truth.
The same can be said about lens quality. The Sonys don't have "bad" lens quality. On the contrary. You still get a very sharp image overall. It's just that the lens used on the JVC models is simply a little better than what Sony is offering at comparable price points. They cannot focus down on pixels as well and focus uniformity across the image is not as impressive either. Again, this is not bias towards JVC, it's simply the truth. Though, I will add that it seems Sony bins their lenses. The more expensive models that share the non-ARC-F lens seem to get lens samples closer to spec. The lens on my 915ES review unit is pretty good, about as good as the lens found in the N5/NX7. But it's not as good as the lens on the similarly priced NX9. The lens used on the NX9 is pretty close to the ARC-F lens.
Part of the issue with these shootouts is that most of the ones I've attended have Reality Creation on the Sony projector set pretty high and the JVC's comparable smart sharpening is not set to a similar level. And this is more than likely the reason why the attendees saw the Sony as "sharper". Sharpness is not one of the bigger differentiating features that I'd even discuss between these two brands. Both are similar enough, but I think the JVCs have edge over the Sonys.
Sometimes I wish we all lived closer together. I would gladly invite people over to show you all of these differences and to finally put these arguments to bed. Both Sony and JVC make great projectors. Both brands have their pros and cons. But let's try and at least agree on some of these basic things. No reviewer I've met or talked to who has reviewed current Sony and JVC projectors will say Sony has the lead here. That's because it's not true.
I like the JVC because "garbage in garbage out" you see exactly what you input without any artificial undefeatable processing.