Well I had a VFC AKS-74, and it was a REALLY nice build. Had good confidence in the stock internals, apart from the plastic cylinder head. But beautiful externally.
The local russian team here has almost all RS type 56's and they're just better all round.
If you can afford the RS, go with it, they're just fantastic out of the box.
But if your looking for an AK74 style like I was, then VFC is the way to go, they have the only high quality folding stock AK74's that I know of....