Was looking at some different swimbaits & just wondered what differences (action, max & min. swim speeds, etc) are there between the single paddle tail ie baby E and the ones with (for lack of correct term lol) a double paddle tail, the one that looks like some of the Tool models, having sort of an upper & lower paddle? Is one better than the other or is the "double paddle" prohibitably more difficult to produce? I've noticed them mainly on higher$$ baits, anyone have info or opinion?