I've got a genuine pair, they were only £25, came new with the original tags on them as well.
I had some fake ones prior that were £15 and both the fakes and the new ones have torn inside the thumbs, but not to a great extent, it's only something you'd notice if I pointed it out. They both have some odd little round things on the finger tips as texturing though, for grip. On the fakes they all came off so easily I thought they might've been stickers. On the real ones they're still there, but they've worn down.
I actually think the fake ones are significantly more comfortable, but the real ones are real

and they do look cooler without the daft shiny, fake carbon fibre knuckles.
All in, I use the real ones, not the fakes. So take from that what you will. I've had them for about 6 months now as well, and I skirmish more or less every week.