hey... rota's ain't too bad.
guess which of the two pictures have the real ones and which ones are knock-offs...
with a couple of authentic Work decals (including the quality control sticker for behind the spokes) and some dupont paint those Rota J.SPL's look exactly like RSZ-R's.
so unless you try to pry the rims apart to see if they're single piece or 2-piece, you can hardly tell the difference.
oh and if performance and quality comes into play... try running real RSZ-R's over 4-inch deep potholes (millions of them here in manila) and see if they don't dent or crack. my J.SPL's have taken quite a lot of abuse (including a couple of flat-out jumps over speed bumps) and they still look brand new. oh and try to lift an RSZ-R on your strong arm and a J.SPL on your weak arm... believe me the J.SPL's are lighter.