I have a Foghead and my buddy has a freak Freak. We are nearly the exact same size and switched suits for a couple jumps. These observations are based on only two people's opinions, so take it with a grain of salt.
I thought the Foghead was the greatest suit in the world until I jumped his Freak. He jumped my Foghead and thought it was much more difficult to fly. His previous experience was in Phoenix Fly and only had 6 jumps on his Freak so far. I have 80 jumps in my Foghead and rather current with it, and still thought on jump #1 that the Freak was better.
The Freak has an obvious performance increase over the Foghead as well. The Freak feels more solid, while the Foghead feels a little more mushy (word choice?). The Freak has a larger flare, debatably faster, and easier to fly. The Freak does have a little more float, so it can be more difficult to fly with smaller suits than the Foghead. The Foghead does have an easier pull, we attributed that to it feeling less pressurized. But these two suits do fly very well together. Their performance differences are small enough that they are pretty effortless together.
There are weird, rather unimportant things that I like about each suit. I like Tony Suits and their bootie zippers with the 3 tabs, versus the Freak and its single piece of small velcro. However, the new leading edge of the bigger Squirrel suits is amazing. The wrist has a neoprene type material for toggle access and has a pretty stout leading edge the rest of the surface for performance.
Overall, they are both great suits and have their individuals pros. But it was a very unanimous decision that the Freak was the better suit in more ways than not. The things we did like about the Foghead weren't overly important, like the bootie zippers etc. So if anyone wants to trade a Foghead for a Freak, I'm in ;).