I have both, laid out with the pin position and cg in the same places, but the MB on the Widow is right of my thumb (negative), and the MB on the Cell is left of it(positive).
The Black Widow gives me more back end pop, and tends to be the ball I like to check the lanes out with.
The Cell for me is a heavy rolling piece, that I can play straighter on patterns that are heavier where the Widow makes it's move too late.
For me anyways comparing the two is like Apples and Hotdogs. Totally different type of ball.
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Formerly SGC300
"Never get into a pissing match with a skunk, cuz he'll piss all over you and like it."-Keyshawn Johnson on Terrell Owens