At $300ish versus $600ish for the retail prices for each, there are arguments one could make for fiberglass over ABS (screen accuracy aside, people inexplicably like buying heavy items...), or numbered limited editions versus open numberless releases. But at the current $2000+ that the Luke helmet goes for, and apparently $1200ish that Wedge goes for, there's really argument to be made. Especially if, as you suggest, the weathering could be improved.
That said, I hope that Anovos doesn't use the Rey helmet to gauge interest for other Rebel pilot designs, since I can't really see many in the costuming community (ostensibly Anovos' primary market) being all that interested in a helmet that served no real function in the film and was worn for about 5 seconds on-screen. Guess we'll see.
