The only AK I regret selling was a Hungarian underfolder with wooden vertical foregrip, back in '88, sold it for $300 in Concord, California, while in the service, two weeks later the Cali ban went into effect and it was worth $1500. It shot alright, fun to shoot. The WASRs are the worst, usually with canted sights and gas blocks, assmebled by Century's drunken monkeys. the last one I had to take to a gunsmith to restake the front sight before we sold it.
True Russian made AKs, like the 101 series, are supposed to be far better, but I have never played with one.
Both are reliable, both are rugged, I like the vz-58 better and feel it works better for me, plus mine shows better accuracy for me than the AKM clones I owned in the past.
Best answer I can give ya!