I have 1 of each. The CETME is heavier, less ergonomic (lefty challenged grip, reversed safety lever, cocking handle way out front, no last shot hold open), has worse sights, variable workmanship (Century has a LONG track record of screwing these things up, mine, like others, shoots left), more expensive, harder to disassemble mags. It is very reliable (100%), decently accurate but with a crappy trigger, and recoils less (that monster brake has something to do with it).
The Fal is easier to field strip, just as reliable, has better sights but most cheap ones come with a straight comb stock the makes it hard to use the irons, handles better, it's MUCH more lefty friendly, mags are cheap and easy to break down, the gas system lets you tweak for various ammo, and sight mounts are easy to come by. It kicks a bit more, but mine doesn't have a brake and weights a few pounds less.
In my mind, there is no question, the Fal has it all over the CETME. But everyone should have an example of each. The M1A beats them both in accuracy, sights, and ergonomics (for me anyway), but costs a lot more. LAter.