My brother has an AK-74. I like my custom AR shorty better in every way, it is certainly a hell of a lot more accurate than my brothers AK74. With Mk262Mod1 77gr OTM ammo, the 5.56mm is extremely lethal, with a very short wound neck profile even in 10.5" barrels. And in any kind of a survival situation in the US, 5.56mm ammo will be far more plentiful than 5.45mm. The same is also true for AR parts vs AK parts, which is no small consideration.
I think i'll stick with my AR.