I'm not sure if the 120fps makes the look mechanic different but it is smoother.
IDK, I’m really skeptical that the game is really pushing 120 FPS. The capability to output 120FPS is not the same as actually doing it. If I had to bet, this game is putting out 60FPS. There’s also issues related to HDMI 2.1 that limit compatibility.
Yea I main pc, this game isn't 60fps atleast on the XSX. When ever I play 60 I immediately notice the stuttering, you also don't need hdmi2.1 for 120FPS anyways. Hdmi 1.4 can do 1080p/144hz hdmi2.0 can do 1440p/144Hz.
Now if you leave 4K on, on atleast the XSX you will only get 60fps in game if your monitor isn't capable of 120Hz since the game is using vsync. Idk about ps5 I heard from my friend he can't use his hdmi 1.4 monitor and get 1080p/120Hz so that's an issue on Sony end since 1.4 is more than capable of 1080p @ 144Hz like mentioned earlier.
There also seems to be the issue of installing the last gen version on the next gen consoles as for some reason the default install on both the ps5 and Xsx was last gen version, I've seen lots of people post about realising they were playing the wrong version of the game since launch 🤣