At Larry's...
It is the perfect amount of sub bread that is nicely toasted with brown edges that gives a range of flavor in the bread in conjunction to the meat, lettuce, and other toppings. Also, how fresh and good quality the meat it is from Boar's Head.
I think it is the cutting style of the lettuce makes it manageable to eat at the right portion. It delivers into your mouth more efficient and effective than any other subs. For Jimmy John, the roast beef is so chewy that you have to deal with that unforgiving perk which you don't at Larry's.
And no, I am not a paid endorser for Larry's. I am just a deaf / blind guy with a high sense of taste and touch who can actually see how good Larry can be.
-Josh