No difference with FM, but need change receiver, and control, maybe if your control can only use digital servo, need also change servo..So need careful select control and see see their requirement, some receiver cannot use analogue servo.. will burn..
no other picture sych as motor, receiver.. etc? , but if the battery is Ni-Cd 9.6V 1000MAH, i sure you will change to NIMH / LIPO, cos 1000MAH not enoght for long time running.