^I got the Black Widow specifically for the better sights and slightly longer sight radius. The ballistic benefits and velocity is a bit better, but whether or not that will actually make a difference is moot I feel. either one is just as easily concealable as the other, I have my BW in a pocket holster and it disappears as easily as ever. You cannot go wrong with either one. I bought the BW because I found a great price on one. If you are interested the guy I got it off from gunbroker is selling another for 220 I believe, which is not bad in my part of the US.
http://www.gunbroker.com/Auction/ViewItem.aspx?Item=224216162
Keep in mind it does not come with the 22LR cylinder (hence the cheaper than usual price IMO), just the 22 mag. This was not a problem for me as I do not stock up on 22LR.