I've seen AKs that couldn't hold 6" at 100 yards, most are 4-5 MOA guns. I have fired many SKSs, own two Norincos, and they hold about 3" at 100 yards pretty regularly. I've not seen one much worse and haven't seen one any better. In my experience, the SKS is more accurate, but it's not going to win any bench rest matches. However, I have deer hunted and killed a deer with one of mine, a Norinco rifle. The other one is a new production paratrooper carbine.
I like the chrome bore if I'm shooting ammo I don't know if it's corrosive or not. It makes the gun more resistant to corrosion, but for practical American shooter purposes, it's not necessary. Probably was desirable in South East Asia about 35 years ago, though.
I bought mine to play with, dress up. I put a 5 round mag on the rifle, scoped it, case deflector, ambi safety, cut off the bayonet lug, this and that. The other one, 16" barrel paratrooper, has a folding stock, ambi safety, 20 round Chinese mag with big commie star on it
, flash hider, laser sight, just a few do dads. It's fun to shoot at the range and the ammo I've bought is cheap. I gave $75 for the rifle and $115 for the carbine, but I've had these things since about 1990. There's no real value in the things other than shooters. Some guys think dressing 'em up is blasphemy, but I rather think that's the cool thing about 'em. There's as much after market for the things as for AKs, maybe more!