You should just buy whatever nVidia card has the most VRAM. Nothing else matters. If one card is slower than another, you're not going to give a shit about having to wait 10 seconds between generations instead of 8. Whatever you come up with to cope with the situation is going to apply in either case. Like if you're watching TV on another device and leaning over to your computer every 10 seconds to press space bar and get more generations, having a 20% faster card isn't going to change anything. Or if you set up batch processing or longer videos you're going to set it to work then get up and walk away to do something else.

But if you pick something with less VRAM then there is a chance that whatever given model has piqued your interest just point blank won't be able to be loaded.

And as far as games go, any modern card is going to be able to run any modern game. Maybe not at Ultra settings but it becomes a question of turning shadows down and just dealing with it. There is no Crysis in 2025 that is making people turn out for enthusiast class cards.

You will be much better off just getting the maximum VRAM you can afford and investing in great cooling.