A 4070Ti is almost in every game 3% quicker (also in MSFS) than a 3080TI without DLLS3 mode active.
There are many, many benchmarks on the internet. With DLLS3 the frame almost double!
I had a 9700K and 2080 upgraded to 3080ti (whqd monitor). The frame rate has gone up but not much<5%. Recently I upgrade to a new motherboard with a 13700k. Now i have decent framerates with the 3080TI but still cpu maintreathed…So go for DLLS3 (4070TI)