I am undecided. R6 II or R7

Larry Rexley wrote:

That sounds about right. However, the higher resolution images contain more image information, and when downsized to the same image size as another camera with the same sensor dimensions (both APS-C, or both FF, for example) the image taken with the higher resolution sensor will appear sharper and contain less noise.

You get a choice with higher pixel density that you don't get with larger pixels.  Larger pixels basically have a built-in "NR" that is not the ideal kind of NR that actually tries to distinguish signal from noise, but rather uses the brute force binning of larger pixels which takes away the finer potential details along with the finest noise, but leaves the coarser noise.  So, even if you go in the opposite direction of what you suggested, and upsample the larger pixels to the higher pixel count, the larger pixels seem to be cleaner, but the whole thing is smeared with no fine details, but you could have done filtering on the higher-density version to get that too, and you would have far less aliasing, with naturally-shaped edges instead of the stair-steps or jaggies that you get when your lens is too sharp for your pixel size.  After the filtering, you can sharpen or sharpen with an edge-only sharpener, and you'll be sharpening more naturally-shaped edges, rather than jaggies.

This doesn't condemn larger pixels, though, if you can still get a lot of pixels on-subject.  Let's say someone uses an 800/5.6 on an R6 and someone else uses a 400/5.6 on an R7; they'll both get about the same pixels-on-subject, but the optics used with the R6 are superior, giving you 4x as much subject light, 1/2 the DOF and diffraction, subject-normalized; the only negative might be a little more aliasing.

My experiences with the 32 MP Canon M6ii vs the 24 MP original M6, M200, and M50ii (all of which have the same size sensor) are that the Canon M6ii has about 1/2 to 2/3 EV better performance in low light and high ISO, when images are downsampled to the 4000x6000 pixel dimensions of the 24 MP camera.