I like Jersey Mike's and Firehouse equally, but in my area, Firehouse is more expensive. So as far as value goes, I'd choose Jersey Mike's.
I've never had a sub at Jimmy John's, but I love their deli sandwiches. Our local one closed up though, and the next closest one just isn't one I drive by very often.
They've been offering JJ"s drive-through shops in my area, but the one closest to me doesn't have a drive through, and I don't think the other local one does, either. Not worth it to drive to another town!
I learn something new every day, but not everyday!
I've learned to never trust spell-check or my phone's auto-fill feature.