Well BDS's and WSM's are the same pits only difference is one is round and uninsulated the other is square and insulated. Both is over priced. Aint got a clue about the other ones. Now I can show you how to insulate a WSM or any other kinda R2D2 type configuration by inverting a 55 gallon barrell over the top. Heck an upside down #2 Washtub works purty good for insulating one of them thangs especially if it raining cats and dawgs etc. It will protect it enough for guv'ment work. I would not take an offset log burner or pellet muncher if somebody want to give me a free one. Or..I might take it and try to sell it on E Bay.