"Vastly different" should probably be read as "snowblizz has no idea what he's talking about and is making unsubstantiated guesses"
But since AB uses points at least all the dozens of gamesystem incorporated there should be compatible with a "points" regime of some kind.
I did not have anything specific in mind a least consciously just expecting there to be something, somewhere which breaks the norm (a drawback of being "scientific", one tends to cloak everything in vagueness and make allowances for being proved wrong).
As you say most game systems deal with "points" of somekind, they may not call them such but that's a secondary concern indeed.
BTW, just struck me, it will be possible to change the size of the roster after you start working on it and when you modify an existing roster I hope.