Wonderwood stoves are made by US stove company. These stoves used to be made by Ashley, who was bought out by US stove. The two that end with B's in the model # have blower kits as standard equipment.
Seeing they all use the same manual, I'd venture to guess the 4 models are identical inside with only cosmetic or accessories included as differences, like the blower kit i mentioned above.
My brother had an Ashley, my father had one, hell...I have one. At one time (I'd say late 70's-late 80's) they were incredibly popular and reasonably priced. They are decent stoves and will do the trick.
