Well to be fair the full dies always go into "Pro" cards first and then the left over full dies down the line go into the Uber Ti Max Titan editions.
4090 isn't that cut down though, CUDA core difference isn't that big, 16k vs 18k and 60 or so tensor cores and around 16 RT cores.
It'll likely be 3090 vs 3090 Ti perf difference with a few percent on top.