Having both, I can tell you that the Cell Pearl is a more arc-ing ball. Its a great ball, strong and keeps going.
The Hot Sauce is flippier, its break point sharper. I'd use the Hot Sauce if your center isn't known for strong backends. This ball will help.
The Virtual Energy is even flippier then the Hot Sauce but its cover is stronger and seems to lose energy more then the Hot Sauce. So my house condition is probably just a bit dry for it.
Erin