In my experiences the Widow Solid, it takes more to maintain it but for me I was able to get great reactions across many surfaces. The Cell was great dull, but I never agreed with it polished, and it was strong enough that it didn't get used as much.
So as I said, the Widow Solid is the ball I feel is more versatile, it took polish and rougher surface better and was usable across more conditions, both are good balls though.