I have both at the moment- To be honest, but
Cell is pretty burned up. I tried my best to take care of it and maintain it, but its a sponge- right now it likely needs a good baking. On the other hand, my Ultra Zone is still in great condition. Although it doesnt flare as much or suck up oil like the
Cell, the coverstock has maintained very well. I also think it is a bit more versatile- Though it is considered a heavy oil ball, it handles my local medium oil lanes with no problem. The
Cell on the other hand works great for a game, but tends to become too much once you get carry down and tracks are set in the lanes.
I think the
Cell is a great ball, but also think the UltraZone may have been overshadowed or underrated because of it.
Just my opinions and observations...