I had both balls....they were both drilled identical. Had the cell first and then replaced with VG. IMHO, I thought the VG was a better ball. It was harder off the break and and was more versatile for me. They both were great balls, dont get me wrong....The VG was just better.
I replaced my VG with a Track 715T and I am very happy with it. Not quite as hard off the break as the VG, but harder than the Cell. I feel the 715T takes surface changes better than both the Cell and VG....
Depends on what kind of motion you are looking for....
My Current Arsenal:
715T................... 65x4.4x30 1000AB
505T................... 65x4.5x30 2000AB
Bank Pearl...........60x5x40 1500 polished
Dark Star.............70x3.5x40 1500 polished
Red Backlash.......80x3x40 2000 polished