Yeah, I was under that assumption. Not that much in the range of 40% but I was expecting a hit. I will stick with the DWF and wait for next (or next next) GPU gen to be able to run 4K well without any sort of up/down-scaling. It's just that little devil behind the ear "you can get the QF for about 200 quid once you sell your DWF".
In that case, you'll always be waiting, as shown, even with a 4090, you really need upscaling for most games, especially if you're wanting more than 120 fps.....