Best setup for max eGPU gaming performance

Hey everyone,
I’m very close to finally ordering a Framework 13. Been thinking a lot about whether to get a gaming laptop instead but I will only really need the gaming capabilities at home and I really wanna support framework because they’re awesome so I decided to go for an eGPU setup instead.
So here’s the question:
In order to maximize eGPU compatibility and performance, should I rather go for the Intel Core Ultra 7 165H or the AMD Ryzen 7840U or maybe even an older/weaker CPU because of better compatibility ?
Also, I was wondering whether 32gb of RAM could be limiting the performance, meaning I should go for 64gb instead. So far I only learned that a dual channel setup will definitely improve performance.
I’ve been looking around for benchmarks a lot but haven’t come across someone comparing eGPU performances between different CPUs, even though they seem to have a huge impact, not only because of pure computing power but also through stuff like thunderbolt compatibility and routing.
Thanks for your support <3