There's always trade-offs, it's about the relative difference in the end because that's what the decision will rest on. There's a big difference between being somewhat picky for hitting 55 fps instead of locking 60 versus not even getting 30 fps. Even with a 5090 you'll make a trade-off because then the temptation is to up the ray # & steps (or would be for me). Personally I'm happy even with FSR/XeSS (DP4A) Performance mode at 4K, so DLSS is even better, though I also play in UW (3840x1620), so would be enough to cap 120 w/ FG which is my TV's max anyway until I get an LG G5.
There aren't always tradeoffs, unless you're trying to strawman it with points about increasing the number of rays etc on a card you aren't going to buy. It's like saying that playing at my native resolution is a tradeoff, because I could always go to the highest DLDSR offering and completely gimp my performance.
While I'm sure the 5070ti PT experience will be a bit better, it's not something I'd base a purchase on, considering neither card will do it that well without quite a bit of sacrifice.