I have an Outcast Summit. I also have a Wilderness Lite. Both are good choices if you’re looking to shave some weight off your kit, the Wilderness Lite being the lighter of the 2. I think the Outcast is 7 lbs.
I found the Wilderness tube to be lacking in rigidity. I’m sub 200 lbs and still I find the Wilderness tube folds up somewhat when sitting in it. Both tubes have a simple sling seat but you can expect to sit lower in the water in the Wilderness.
Materials-wise, to achieve the lower weight the Wilderness uses thinner materials, thinner stripping apron etc.
For me, in the end, I’d prefer to carry a few extra pounds for a beefier tube. Don’t get me wrong, the Summit will never be mistaken for a Fat Cat, but it’s more sturdy than the Wilderness.
If you’re unable to lay your eyes and hands on a Summit before buying they’re nearly identical to the OG Caddis Nevada tubes. U shaped, arm rest pockets, back rest pockets, yata. The Outcast just costs like $150 more.
Having just retired my beloved and well traveled Outcast Trinity for hiking trips I was really eager to get Outcast’s next iteration of hiking tube. I admit to being disappointed in finding they have basically knocked off the Caddis Nevada. At 7 lbs, V shaped, ample cargo net behind the seat for storage, the Trinity was the perfect high country tube. I bought a Summit none the less and it has proven more than capable for the job. I’ve got about half a dozen long haul hikes in, including overnights, and more or less am happy.
I’m a weight conscious hiker and tuber and just find the Outcast to be the better option.
My $.02 USD. Good luck out there.