In MSFS, head tracking always seems to be just way smoother in general than panning with a mouse. I get a bit of stutters when panning, especially when panning fast. So I'm kind of getting used to panning more slowly and deliberately. Also, using Flow Pro, I've made a little shortcut to the settings toggle for FG. This way I can turn it on very quickly when I need it (when departing and landing at busy airports on VATSIM) and turn it off in cruise, thus avoiding the slight stutters when FPS are good enough anyways.