No, they're the exact same daughtercard, remember? They had to reuse 233mhz Apple daughtercards because it has the ROM in it, and Apple wont legally let them reproduce it, so they had to modify existing daughtercards. Soo... I think it should work, but I have no money for it, so I guess its a moot point. However, it would be SOOO cool to bump it to 500 (Cuz itd be the fastest iMac in the world, that I'm aware of )
Ca$h