The VPL-VW295ES simply looks more naturally sharp than any of the lower resolution 4K capable projectors, whether they are basic 1080p pixel shifters (2x) or (4x - the lower res "4K UHD" DLPs), or the 2716x1528 4K UHD pixel shifters).
With all the controls any of those others can at a glance, on 4K content, look as sharp, or even sharper than this Sony. That doesn't make them better, what that tends to make them is over processed. I've long talked about how those lesser resolution projectors when set up to look really sharp, tend to add visible hardness to the picture, something that may look great on a outdoor scene, but may really look too hard, and not too natural (even when the color is great), on close-ups of faces.
While I've had the Sony here, I've compared it to the Epson 5040UB, the Optoma UHD65, and a couple of the lower res 4K UHDs (BenQ HT2550/TK800) and the Viewsonic PX727-4K.
In every case, the differences in sharpness are slight enough that you really can't tell differences at 15 feet back from a 100" screen - Except if you look at one of those face close-ups, that is over sharpened, that you could spot differences in sharpness and detail.
It is always tempting to "up" sharpness, detail, image enhancement, and other similar type controls to end up with the proverbial "razor sharp image." That said, in the long run, many folks end up doing that, but eventually, tend to dial back some of that extra processing for the more natural look.
In the case of this Sony - sure you can crank up its Reality Creation engine and get a similarly over sharpened type image, but there's no need to!
I should note that when I run a photoshop image into these various 4K projectors - one with just 4 color pixels in the center - a red, green, blue, and a white one, in a square layout, This Sony does a better job of separating colors (still not great) than any of the non native projectors. The only one that has topped it has been the 5040UB (seeing the different colors), but when it does that, it also definitely has the slightly hard look I keep mentioning.
The bottom line on sharpness and detail.