I've become a big fan of the reverse flow smoker design for a stick burner. Either way you're getting quality, but I think you're getting more "bells and whistles" with the Lang. That insulated fire box on the Jambo is neat though. In the end, I think you'll have more even cooking with the Lang.
Custom 30"X84" competition-style RF trailer smoker
Pecos 20"X60" OS by Old Country BBQ
Char Griller 5050 with side box
Baby Arm BBQ