Both ties are correct, although a tuxedo worn with a long tie is cut differently; mainly the lapels...they are narrower, to accent the long look of the standard tie.
A bow-tie tux has a more 'showy' lapel design...wider, and more complimentary to the bow tie.
Of course, it goes w/o saying that cummerbunds are never worn with the former, and IMO, should be done away with entirely with the latter.
BTW, if he can manage it, get a simple dress shirt with French cuffs that require cuff links. They're SO cool!
It also goes without saying that inline skates are OUT...
but black hi-top Nikes are just fine!