As far as E-shift goes, here is a pretty good article from a few years ago.
From the article:
"The most pressing question for consumers is, “does it actually look better?” On the whole, yes. Images projected using the 4K upscaling and e-shift2 optical output have the appearance of having higher resolution, and feature smoother diagonals. What’s more, there is hardly any pixel grid visible on the image as a result of the system.
With that in mind, you might be surprised to read that turning on the e-shift system causes the actual resolution, as seen with single-pixel line pairs in resolution test patterns, to drop. Black and white alternating line pairs, used to assess resolution, appear more defined when the projector is operating in its “original” 1080p mode. And yet, with actual content, we still preferred to have the e-shift system enabled.
We wondered if the black and white line pairs could cause temporal crosstalk between Sub-frame A and Sub-frame B. Remember, in a resolution test pattern, the lines are packed directly beside each other, and to display this with e-shift, some of the pixels on the imager may be put in a position where they must rapidly switch between white and black. Therefore, we might be seeing lessened resolution with these patterns due to the extreme changes we’re asking the LCOS chips to make. (The idea that static resolution can be impacted by the panels’ motion resolution is a concept that still bends our minds). Real movie content is not so synthetic and challenging as this, which would explain why we had no complaints during actual usage: for example, asking the LCOS chips to change from one extreme of the dynamic range to another (white to black) is a harder task than asking them to draw, for example, similarly coloured pixels in an actors’ face."
But with this being a native 4K projector, you have the choice to turn E-shift off if you want. As I said, I will compare both ways and then decide.