The original Q was AK vs G-3 or CETME.
I've owned an AK and shot many, including "The Switch" equipped model.
I've owned a CETME made by Century (nice one) and shot HK91/G-3s and FALs.
For a short handy carbine for under 200 meter or 300 meter use, get the AK. It's handier, has good performance, plentiful mags, and rock solid reliability, and will certainly hit a man sized target at 200m or less all day long. It may not get tiny groups, but in combat, a hit is a hit and few people are getting tiny groups in combat usage, which is what these rifles are built for originally.
The CETME for offhand use (house clearing, urban warfare, etc) isn't exactly "handy", i wouldn't want to CQB with it because of the length and the ergonomics. For prone or sitting position shooting at 200+ meters, it's excellent and has decent sights for this (sitting in a trench ambushing Soviets from a hilltop in Afghanistan, this would be a good rifle), as would the G-3, which has even better sights for this purpose. Long distance is it's forte.
If you want a handy weapon for medium to short distances for plinking and SHTF, a medium to high grade (Bulgarian, Arsenal, Russian Krebs Custom job,etc) or Vector Arms would certainly be indicated. The Krebs KTR-03 would be the best of both worlds...... Russian made gun, rail system forearm like our M-4s, and an aperature rear sight for good accuracy like the Galil or Valmet (both AK derivatives).
To clear things up: Long range, hard hitting, decent accuracy, get the Cetme, G-3, or better than both, the FAL. However, ergonomics on the G-3 and CETME are worse than the AK.
Short (0-50m) to medium (200m) range, fairly hard hitting and decent accuracy, get the AK.
Having shot all three, if I couldn't get the FAL, the AK would certainly be my pick if an M16A4 or M4 carbine were not handy. Fixed stock only, the folders are easy to carry but harder to shoot.
Edit: between a Romanian AK and a Cetme G-3, get the AK. SAR-1 preferably, this is what I had. Besides, 80% of the world uses AKs or has them around, in a real SHTF situation, parts, mags and ammo plentiful.....unlike the Cetme, which was only used by Spain, and the G-3, which was used by about 50 countries, only about 5 which still use it.