To me, sensible approach to voting should be a common sense by moderator.
Obvious spelling mistake should be handled automatically: Fillippone Filippone or fillipone have little doubt about voter intention.
Lafu01 vs Lafu should be handled with a little bit more care, maybe tagging the original voter.
I agree with you, the problem is if there are two users with very similar names. A different character is enough to be another user.
But of course it all depends on the moderator doing the counting and your common sense.