Sorry for the delay Raja didn't realise you could get messages on this site. Don't work for Ricoh but I do repair the Ricoh machines. Unfortunately I don't have any of the MPC7500/7501 in my area but the answer to the question is no the toner and devs are different.
Hey are you a Ricoh Guy?
If yes,please let me know that MPC7501 toner can work in MPC7500 machine?