Both Harbor 60 and Barbarians are more or less the same. I'd give the edge to Harbor 60 myself, but somebody else may go the other way.
I don't think you'll go wrong with either.
Both are "old school" steak houses, with Barbarians being more old school I suppose (in that Habor 60 has a more modern up to date feel inside, better looking women working there too. (Far better as last time I was at Barbarians, it was pretty much all men working there).
Another "old school" steak house would be "The Octagon" up in Thornhill and La Castille in Mississauga, though La Castille would rank a distant 4'th on the list.
Once in a while, I'll go old school, but frankly, if you're looking for anything innovative, or unique on the menu, you are not going to find it. Not ever.