First the denim used for the fakes are really crappy and use to color off on ur hands if u touch them alot.
The easiest way to spot a fake is if you look inside the pockets, where the fakes (evisu, artful d, rmc) only have a straight stitch around the pouch and the edges are left raw and not even serged. for rmc evisu and bape its only around 2 factories in china that makes the fakes, so their construction shouldnt differ much...
I've seen more fakes than most of the people, I happend to work in one of these factories 1 year go
