I just got a knockoff Reverse and the most obvious difference is that the Fake has NO screws in the handles, so switching the knife to be like the P'kal isn't possible
Here’s a list of things that I noticed compared to my Gen 2 Reverse.
Fake blade came oiled, slightly bigger Spyderhole, tang shaped different, font of company and steel is engraved and a different font, handle bolts and slabs are not seamless to the touch, narrower blade section toward the front and not as tall, company and designer logos only on 1 side and the roughly ground blade is sharp at the first inch only.
Fake sheath is wider, with rough lips and a fake Tek lock which flexes if you pinch it, the box isn’t the same Spyderco box and wrapping they use, and mine came with a letter of history..... describing the Jot Singh Khalsa folder.