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I'll answer your question partly, in a roundabout way.
I have a Mac Pro 2019 with two Pro Vega II, each with 32GB RAM and I have a MacBook Pro M3 Max (16/40). My MacBook Pro beats my Mac Pro in almost every way. The one outstanding thing, that the Mac Pro still does better by a clear margin, is Color Grading in DaVinci Resolve. Notice that I don't write 'Editing', which is the word you used.
I really like the M3 Max and the overall package is great. It even has hardware raytracing now, which puts it clearly ahead of the Mac Pro in apps like Blender, using GPU rendering—despite the Mac Pro having two decent gfx cards with lots of memory.
But some GPU-tasks, like playing back video realtime in Resolve's Color page, the Mac Pro still does better—up to 2x in some node configurations.
My first question would be: why would you want to Edit/Color your clips at 6K+? Pros have stuck to normal HD for the longest time and I guess many still do. If a bump is necessary, perhaps cap it at UHD/4K?
In the case of Resolve, it's resolution independent and all your grades and masks scale if you switch the timeline to 6K/8K for a last pixel check before exporting from native resolution anyway. Even dropping to 4K helps a lot.
For Editing, specifically, it's less of an issue. If you're talking about ingesting clips and just editing them under a LUT, that's much less of a problem. The RED .r3d is flexible too, so you can tweak the quality of the debayering as I'm sure you know.
To come full semi-circle, as it were, a Mac Studio M2 Max is not the greatest computer for Color Grading/Correction work, but it can work if you approach it sensibly (I'm sure there are other users here that can testify to that). Still, if I was building a small suite/bay, even if it was only for me, I would base it around something with a proper gfx card.
I really like Macs and macOS, and maybe you do too? There's something to be said for my 2019 Mac Pro with "unlimited" internal storage and room to grow up to at least 2x Dual W6800XTs. It IS a shame that it's dead in the water now though but maybe you can find a good deal on a used one as people are letting them go?