Those Marquee your comparing is actually quite different, but they look very alike, the main difference is the camera and camera settings, i have the advantage of a calibrated UHD monitor to evaluate my pictures, so can more or less set focus exposure and color balance to match any reference, as well as a camera allow.
You picked the one of my shot who had a bit of processing/ enhancement addet, i made a direct comparison between processed, and non processed, where you will see the noise the processing adds, just like whats seen in the JVC shots.
I can see they are a bit overexposed in comparison to the screen cap.
My marquee run with LCP tubes and some other lenses, its slightly defocused to hide scanlines and stair stepping on edges, running 1080P 72hz 178Mhz.
I can add any amount of processing i like, to make it look like a JVC, or even more, and make it look like a SONY, its quite funny thinking about this thing was designed, and came out over 20 years ago, most of them is still running, and still will when this generation of digital projectors are dead and gone.
I started with a standard Vidikron Vision One some years ago now, all standard, with dirty glycol, and a old DVDO VP50,
And back then i prefered the standard CRT over the JVC X7, now today the CRT projector is in a hole different condition, in wich im confident it will even carry on and outshine any comming generations of 4K projectors, as long as its used within its limitations of screen size. There is still a few things that can be done to improve performance, if needet, something that has never been possible on a digital, where only solution is to add a external processor, and tweake enhancement and calibration, with whatever loss and distortion that adds to the image. Its a hole different ball game.