It's a sim from creators of Falcon series, so I didn't expected anything less than "5 times as difficult as LOMAC".
FreeFalcon 5 is, in general, about as close to flying an actualy F-16 as you can get without joining the Air Force. I would be suprised if DCS was less detailed.
I'm confused at what you're saying here Dragon:
(a.) Falcon 4.0 was originally released by MicroProse, and the licence was then later bought by Atari.
(b.) FreeFalcon, Open Falcon, and all other source code leak derivatives of Falcon 4.0 are independently developed and all are, as far as I know, freeware.
(c.) LOMAC is made by Eagle Dynamics, a company made famous by the Flanker series of flight simulators. They're a Russian firm, and have no affiliation with Spectrum Holobyte (the original creators of the Falcon series) or MicroProse/Atari. LOMAC to my understanding has been accused of being a pretty mediocre sim - I have it, but bloody hell, I've never gotten it to work properly. I tried re-binding the keys so I could use the program more effectively, and then the program didn't even respond accordingly. I've not touched it since. And the DRM pissed me off to no end, either. That said, they also make the DCS series, and I've heard mixed reports on their quality. But... that's going off topic. However, now that the record is set straight, onward, chaps.
*EDIT - Davros beat me to it. You sneaky ninjas, you...