ok, let me try to write a review of the sort I was looking for when I was first shopping..
I first bought the 'original' about two years ago. I practise most days in-studio, often several flows a day so it has had decent use. Hot yoga perhaps one third of my studio classes. I am a short, very vigorous, very athletic guy. I sweat buckets in the hot classes.
A few notes;-
The try-before-you buy sample thing was invaluable. For me the surface on the Unity was far too coarse, the Aura was far too squishy. I am sort of considering trying a travel mat for my erm.. travel. That one is harder and just a thin cork surface though.. Ultimately the original was spot on.
I am an intermediate to experienced yogi;- I can hold handstands, float backwards and forwards etc etc.. If you had caught me perhaps ten years ago then like everyone else, I tended to transition heavily and slide a bit in sweaty classes because I was relying on mat traction. At that time the original would have been too hard a mat for me. I was on a 5/6mm rubber ones and that was a good place to be, I just did less yoga then. In short, if you are in the first few years of yoga or not nuts about it then I think these mats may not be ideal.
For hardcore creatures, it is (much!) more slippy than a b-mat but more grippy than a Manduka-pro, (especially with moisuture!) ;)
My main question before I bought it was will I just kill it in two months? (my rubber ones used to last 6 months or so before my hands and feet drilled through them) -Brief answer, no, it is tough. My 2-year old original has a lot of wear, I've re-glued on cork bits and there are hairy fibers around the edge but I love it and am still using it for hot flows;- there is nothing that affects my practise. It is probably important to note that I am very very kind to all of my mats;- this one is rolled loosely, cork side out, as per the Yoloha instructions. I clean it after every practise with my own (no solvent) cleaner and then I lie it flat on the hard floor under my bed when I get home. I did once get drunk after a hot practise and left it wet and rolled in a bag overnight and it did not like that at all, it curled for a few days to punish me.
The 'cork is better for traction and sweat' thing I don't really notice;- the amount I sweat in a hot class, there will always be a pool. It's fine.. I tend pull over a dry towel as we hit the floor for backbends in hot flows where I still need extra traction. Apart from Manduka, the grip in the wet seems very similar to good rubber mats.
An unexpected last note; I love the surface texture and the cork smell. I actually don't think I could go back to rubber for that reason alone. In face-down rests, I am very happy to have my cheek on it. I am the dude that might be meditating or might be asleep twenty minutes after the class ended, nobody knows :p .
Bonne pratique.