More of a little photo comparison for folks.
I've been using the Lone Wolf hand climber for several years, but wanted to try something new this season that was a bit more comfortable to sit in.
I chose the Tree Walker based on the reviews I'd found on the various boards.
I've only climbed in the back yard with it so far, but I can tell you it seems very solid on the tree (it bites in hard as you'll see in the pics, but the tree doesn't seem the worse for wear). It's also about 10X more comfortable to sit in than my Lone Wolf.
The draw back of the Tree Walker is that the Lone Wolf packs much more flat and is about 2 lbs lighter. The Lone Wolf (mine is an older USA made model) weighs-in at 17.5 lbs. The Tree Walker (also made in the USA by the way clocked-in at 19.5, there is also a detachable bar that came with the stand so it could be used as a sit-n-climb that takes it right to 20 lbs.)
The net seat on the Tree Walker is very comfortable and you don't sink down in the seat much at all, so the arms you see in the pic basically run along your thighs.
The Tree Walker sets up just as fast as the Lone Wolf and has a wider adjustment range than the Lone Wolf (according the the marketing copy). Both are rated to 350 lbs.
If you've been using something comfortable all along, you may not see a big difference. But if you've been using something like my Lone Wolf, there's a BIG difference in comfort.
Just depends on what you're looking for.