I have played both games and wish that Ghost Recon could have even come close to OFP. I am greatly disapointed with Recon. Operation flashpoint has good graphics, tremendous choice of weapons vehicles, decent ai, HUGE levels, weather, lots of great updates and much much more. Lemme think what GR has, weather, decent graphics, poor AI, poor choice in weapons, almost no updates (they also have nothing in them), NO DRIVABLE VEHICLES. You've heard my opinion on this game. Plus it hogs a gig of my hard drive.
Too bad GR can't live up to the hype. :/