As far as I could tell, the main difference was the thickness of the laminate. The Green Earth seemed to be a 1 mil and the Proraps laminate is a 1.5 mil. So, in theory, the 1.5 mil Proraps will be more durable.
I've found the same thing boyfactory, both work great, but the Green Earth wraps do seem to be thinner with the laminate. I've also notice that the outer nylon cover on the GE wraps gets pilly earlier than the prorap nylon.