yes, its a huge difference... alot better on pc
yes you would feel like playing on powerpoint after u play @200fps and u go back to 100
FPS difference is logarithmic, meaning, the upper you go, the less difference you see, but you still see some. I haven't really looked into what base would the logarithm have, but I can say, that I still see the difference from 200 to 300 and from 300 to 400 fps. Anything less than 200 doesn't feel as smooth (have a 144 Hz monitor). Anything above 300 feels super smooth and is fine.
is a must ahve in csgo imo