I've had both. Still have AFM. Bought RFM to try to "scratch the itch" without paying the admission price for AFM, which at the time was $8000+. There was no "write a check and get NIB" remake yet.
I loved it for about 2-3 months, and then realized I needed my grail game, which was AFM.
That being said, I do have a soft spot for RFM and will put a few quarters in when I see one to play. It is really fun for what it is, but comparing it to AFM is like trying to keep a candle aflame in the midst of a hurricane. No chance.