The more tools you try, the more interesting things get. So, a shootout, (splitout?), between them would be fun. But the unbiased part is kind of tough since we are all biased by our own preferences. You and I seeing the Fiskars in different lights is a perfect example. We will all prefer the one that performs best in our own hands. Much of this is what I'd call a good fit for the individual. Weight, handle shape, overall length have a lot to do with that. Species of wood, size of wood, wet and green, dry, frozen. There are so many variables. Enough that IMO, having a few different tools is a good way to go.
Now, the design and dimensions of the tool head as we've been discussing here could be looked at a little different in the sense that some have more engineering thought put into them than others. And those that do will generally perform better than most of the cheap stuff. And like John says, some of the cheap tools can be altered to make them perform better. If we're going to mod the saws, why not the mauls?
I think that it would be great for any of us to sample a bunch of different tools. But I don't see a shootout where it ends with determining a winner or anything along those lines. It still is really going to come down to personal preference, and most of us are likely to pick what we already like because that's what we are used to. The best part of such a contest would be that someone gets their hands on a tool they hadn't seen before and says, "Hey, I really like this; I'm gonna get me one of these." So, the winner is the user himself.