Generally UI is smoother on Windows due to the really mature desktop compositor that's light-years ahead of eg. Xorg. WDDM is actually a very good display drive

Generally UI is smoother on Windows due to the really mature desktop compositor that's light-years ahead of eg. Xorg. WDDM is actually a very good display driver model, UI crashes are really rare nowadays compared to eg. Linux (and this is not just driver quality). So Linux is definitely faster for my development tasks, but slower when I'm scrolling in the browser.