Or maybe the difference is that the Brazilian one is for real and the Vegas one is a scam. Anyway, the Brazilian ad is a lot more interesting, quite a bit of talk during the couple of years it has been up there. Someone in London wanted a shipping price, and I think was told ca. $2K.
The valves apparently come from a "Quasar" model Eb, looked that up and it's a sort of Brazilian Carl Fischer. No Eb models currently show up. Did Jinbao ever make a front 4 compensator? I guess it's remotely possible they stenciled a Besson. The seller is not the original owner - I think they're in São Paulo and he was in Curitiba.