ok... well firstly black ops 2 online level is not saved on the save, its saved online on the servers so even if u lose the save u still have same level. and answering to your question yes it is working. u can either copy every save manually to a usb and then put them on the other ps3, or u can data transfer the whole games/saves/ whatever u got in there to the ps3 u want to put them on. for this u need an ethernet cable and u need to have the ps3s on the same firmware version. but better than me explaining it, u should read a tutorial on how to data transfer as u would understand better from there. good luck!

Would it matter if one PS3 CFW?