while i have only run a couple test sessions so far, im leaning heavily towards RMC. i first picked up RMFRP and read through it and loved it.... except for the skill system. holy crap, it took me 4 hours to roll up a new character the first time. now, i can use those rules and create a 1st lvl char in about 2 hours now.... but still. Also, there are so many skills in FRP that it gets really hard to remember all those nifty little skills you should buy... and everytime i built a character, i forgot a mountain of them. Now, eventually, i would get the hang of it, and so would my players... but they decided to say hell no to FRP... pity for me, haha.
so i bought the pdfs for RMC. and i loved it instantly. i love the way stat bonuses are handled, how stats are generated, the simpler RR system, and the skills really sold me. the primary list has just what you need to have to run an action packed game, the sort my group is used to switching over from dnd 3.5. but, the secondary list expands and allows for more detail in a character for those that wish to use it. the background option system in RMC is also much better in my opinion, as there are enough options to start with, and you can add in your own options later. I like the combat system even better, while snap, normal, and deliberate actions do make for some great tactical advantages, you can normally accomplish the same in a combat round with short and long actions, and it doesnt slow the round down as much.
im looking forward to seeing the combat companion and what it does for the game, and also i will be picking up HARP in the near future, just to see what i like from there. Overall, i dont think ICE has ever done anything badly, just differently and to each individuals personal tastes without their games losing the "ICE" feel to them.