Keep in mind that the vehicle greatly matters here, if you're comparing the JL's vs the HO's in different vehicles. That Envoy is going to have significantly better overall cabin qualities (inherently) and a better box layout/box positioning than a single cab truck.
In-cab pickup truck boxes can be some of the hardest to design, especially when you're not "stuffing" the vehicle with subs. They can be very hard to get to sound good. This is something I've noticed after having an extended cab pickup and doing many pickup truck designs for others. If you're running smaller subs and you can't side fire low down in the vehicle behind the seats, then I really prefer bandpasses. It basically seems like the cabin being much wider than it is long is part of the acoustics issue. Like with your box and everyone else's single cab box, I do the best I can with the space and layout options that I'm given.
If you want the best sound in a pickup truck, do a blowthrough.