I tinkered with mining during its peak since I had so many old cards laying around and was in the process of updating a few as well. It does like more ram but favors speed even more once you're at/over the 8GB mark. I have an
EVGA RTX 2080 Super with (GDDR6) that did pretty well because of the faster ram. My older cards, the 1080s (from my last SLI setup) and 1080 Ti did ok but that Super was about 20% better than the 1080 Ti even though it had more VRAM. The cards that did the best were the 2080 Ti and a 3090 but that's not including power usage although undervolting/underclocking could do a lot to balance that.
In the end, before I stopped altogether, the optimal setup on my old X79 motherboard was using the 2080 Super, 2080 Ti, and a 3090. I have to say that the Super was an interesting beast in that while on some levels it was only just more powerful in terms of rasterization of the 1080 Ti, the tensor cores+DLSS allowed it to take a step further and that combined with the faster VRAM gave it just a bit more to boot. The other neat thing is that it only needed 2x 8-pin connectors while the 1080 Ti used 3. I originally bought that Super to use with my original 3700X build with the LG C9 since it was the only thing I could afford to be able to use the C9's 120Hz HDR g-sync, albeit at 1440p. It was also a nice BF deal in that it cost less than the 1080 Ti did at launch.