I own both, and yes, they are two different kinds of knives. And that windmill fuel over the landyard hole never kept me up at night for one moment.
I would carry either if I accidently picked up one or the other. I do prefer to carry the AR with blue jeans for the weekend, and the SnG for work. For several months before I bought the SnG I did carry the AR for work.
I've heard the 'rough finish' argument myself. I think it's deliberate.
Mick takes the thickest, toughest piece of metal he has in the shop and walks up to the grinder. He ponders for a moment and then says, "What kind of a knife can I make today so that idiot Ichabod can't break or won't cut himself with?"
A tidy, doilly finish is never part of that equation.