Two of my favorite knives from my 2 favorite manufacturers. I actually have both on me right now. It's really tough to choose between the two, so you have to decide if you want a better slicer or more of a bruiser. Both of them will handle whatever you can throw at them (watch Dutch bushcraft knives video with the Super Freek... Its ridiculously tough, and the Shaman is at least, if not more so).
I think the Shaman ergos are slightly better, it just melts into my hand while the Freek is a little more square feeling. The Freek is more fidgety thanks to a lighter blade.
I don't even worry about S30v vs m4. I love m4, but if you've seen what S30v can do it's pretty much a wash. Do you want stainless or not?
They both carry great. The Shaman is a little wider in the pocket but it's not obtrusive. It is heavier, but you can't tell when it's in your pocket.
So yea... More slicey or more brute force. The correct answer is to get both, you won't regret it. But if you can only get one then toss a coin.