It's not quite as daft as it sounds this. When I briefly had a S5 and was trying to speed the thing up I ran a tester app which showed my SD card was capable of faster data transfers than "internal SD." Now I don't know if the note 3 has the same sort of setup but would an app be slower on the external SD as you'd expect, or if there's an advantage to moving stuff to SD aside from making more room for stuff.