Scribe
Legend
No they don't. Simply tweaking the stats makes for tiny differences. If you want actual significant differences you need things like Darkvision (although that's overused), Powerful Build, Claws, Telepathy, and more. If the entire difference can be concealed behind a string of lucky or unlucky d20 rolls then it isn't a meaningful difference, just tedious book keeping that doesn't actually produce significant differences.
As per usual.