Here's a photo guide:
In terms of chopping, I rate the Campanion and Magnum Camp as similar, even though they look quite different. But the blades themselves seem to weigh close to the same and so you get about the same kind of power. The Campanion will probably take batoning more (I've hammered on both with a large chunk of wood and I can't tell much difference--it didn't faze either) because it is thicker, but one thing I like about the Campanion is that it carries well, i.e. not too long but will deliver big knife performance. This is the Becker I carry most often while hunting. It chops the little stuff like squirrel and rabbit paws or the ocassional briar and rides comfortably.
The Magnum Camp has a finer tip and is a better slicer than the Campanion. If you want to chop really heavy stuff or split kindling, I think it will take to a baton without much trouble. The Becker steel is truly excellent. I think it's far better that a lot of people realize. I met Jerry Fisk at a hammer in a couple weeks ago and got to chat with him about the magnum camp which he designed. I asked him what the closest steel would be to the Becker line for comparison,and he replied 52100 which ain't bad at all. My own experience is that the Becker line takes and holds a great edge and it has an excellent bite. Jerry showed me his personal magnum camp in which he reprofiled the edge to a nice convex grind on both sides. He then held up a sheet of paper and began slicing strips off of it. Pretty impressive for a big knife. The Magnum Camp qualifies as a mini machete and it will slice tomatoes too.
As for the Brute, it's an excellent chopper and easily superior to the Magnum Camp and Campanion for sheer chopping ability. The bent handle and weight forward design really makes it a solid chopper. I think I will reprofile the edge on mine though, and give it a convex edge like Jerry did on his Magnum Camp. It's an awesome edge. As for whittling with the Brute, it suffers from the same problem all big honking knives suffer from: it's not all that easy to choke up on the blade and use the tip for fine work. But you can if you need to. And it will definitely bite into wood for whittling. Again, the Becker steel takes a nice toothy edge. I can't wait until they bring out a hunter with that steel. BTW, the Becker handles are some of the most comfortable I've ever handled and especially comfy for chopping.
I really love the machete. Although it has a tendency to stick in green hardwoods while chopping, for wrist size stuff and below it is awesome. I've also used it as a draw knife and it excels at this. Maybe a thinner lighter machete would do a better job on light vegetation like grasses and such but this machete is more versatile and next to custom, I don't think you will find one made of better steel. Again, I am planning on reprofiling mine to give it that "Fisk edge" but it does pretty good without it and if you are clearing heavy brush or clearing shooting lanes for hunting, this would be the knife to take. It also has a spine rugged enought to take some heavy baton work.
I have no experience with the machax or tac tool so can't comment.