I own both a Maadi and several Chinese guns, both Norinco and Poly Tech. Though I have no personal experience with the European guns, the ones I have seen at shows seem crude by comparison.
Overall, the Chinese guns are better finished than the Maadi. However, there are significant variations between the guns. For instance, my folding stock Norinco is almost commercial quality in finish. The weld spots on the reciever are so perfect, they're almost decorative in appearance. The heavy barrel NHM 91, by comparison, has welds that are crude and ugly. It still, however looks good compared to the Euro pieces I've seen.
The bottom line is, you have to see and handle each piece to decide what you like best. I don't think you can draw any conclusions based on maker or model number. If you find one that looks good, that's probably the one to buy. For instance, my Maadi was one of about 15 I looked at, at a gun show; so it looks pretty good; but I still had to replace the front sight , cause the original was crooked and I didn't spot it til I got home.
Good luck with your search