The UGG jacket has real shearling. The label says 100% Toledo Shearling. Faux shearling is different from real shearling. Real shearling feels more durable (not so much softer) and with faux shearling you can see the white fabric underneath if you push aside the furry fluffs.
Then there's different quality of faux fur. For example, I'm not too fond of the one that's used on Trev's jacket. It reminds me a bit of the fur on my White Sheap Leather jacket. It looks kind of meh with the large fluffs with some of the white fabric visible underneath:
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Compare it for example to this faux fur. My girlfriend has this jacket and the fur looks and feels way better:
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Compare to an original UGG:
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Did I mention legal issues? I did. Don't overdo it. By doing exactly what you've just done you may wake up sleeping dogs and alarm UGG about this project. You could cause Indy legal trouble and they could shut down this project, which would get us nowhere. I surely hope you didn't send a link to this forums or this project or Indy's site.