Although I've owned them both, I can't say that I've used them side-by-side. I believe that the Brute Strength is slightly cleaner and slightly more angular off the friction. I'd probably be playing the same line with both.
Both balls are very easy to tweak the surface with good results, too. If I had to pick one or the other I honestly couldn't say one is better. I'd be perfectly happy with either one. Pick a color?