The DW is going to sound different than a BB, by a bit I'd think.
The "Brass character" is going to be there in both drums, but the DW shell is straight, and the bearing edge is different too. Those two things alone are going to make the drums different.
The BB is great (I have 3), and the DW is a great drum too, so you're not going to go wrong with either one IMO.
The DW may be a heavier drum too (depends on the shell thickness), which will give a very solid, beefy sound, especially for rim shots.
The BB is a spun shell with no seam, the DW has a seam....but in reality (and not living in Ludwigville haha!), as long as the seam is done well and the shell is in round, it's not going to make an audible difference.
If you can get a great price on it (look it over to make sure its not somehow a "second" if they are blowing them out with a really cheap price), I'd say go for it--and post a review on it (after you stop looking at it, wipe the drool off, and play it that is haha!).
Good luck!