Of those two? Quiznos, hands down. I love me some Black Angus on rosemary parmesan bread with the hot sauce.
When I lived in Jacksonville,
Firehouse Subs was da bomb, for a chain-like sub shop.
When I lived in Gainesville, there was a hole-in-the-wall joint called Hogan's Heroes. It was a sub/sandwhich shop and bar all in one. Grill behind part of the bar so you could watch them make your spicy meatball with hot and sweet peppers... some table seating, and a half-assed attempt at a sports bar. I don't know what it was about that place, but they had the best.subs.EVER.
Locally, we have a mom-n-pop place with 2 or 3 locations around town called Russo's. Old man Russo has to be 147 years old by now and that old bastard still gets up at 4:00 a.m. to bake the fresh bread for the subs every day.