either the 4K77 DNR Release or 1.4 - which has color corrections but not DNR?
This is correct.
Basically, when Williarob did the DNR for 4K77, it revealed a lot more dirt and scratches that was hidden by the grain, so he had to do a lot more additional cleanup. Then people weren’t agreeing on the color timing of the initial no-DNR release (prior to its release), so he made the initial no-DNR release “white balanced” to the sprocket holes on the scan with no other real color correction, but did his own color correction for the DNR release.
This means that the DNR release of 4K77 starts off with an entirely different base color grade than the no-DNR release, so you can’t just take a color correction made to the no-DNR version (like Sanjuro’s 1.4 color correction) and apply it to the no-DNR release, and you can’t just take the no-DNR version and re-apply the DNR without having to do all that extra cleanup all over again from scratch.
Thankfully, ohteedee is currently working on doing just that (re-applying DNR and redoing the cleanup) to bring both the DNR and no-DNR versions back into parity so color adjustments to one can be applied to the other, just like they’re able to do with 4K83.