it depends & varies on the manufacturer and from where you are buying.....i own orignial ones as well as local ones too.....and i can tell you is that if yo wana buy a local one just visit the manufacturer yourself and get it made from their, do not buy from local dealers, they sell you shit.....
i performance of these clones is i can tell is on par with the original ones & I would say its the 90% +.....
beretta clones being made these days , one can swap the orignal parts in those such as barrel & mag.....my carry gun is local made tokarev in 9mm and I have fired 350 round through that i can tell you not one fte or ftf i had with that weapon....and its dead accurate even from 25 mtrs
daudsons is different ball game, they export their side by side shotguns to EU & US and they sell for 3000$$....
their Trushot 9mm also has BATFE approval which means that can be imported to US too....
apart from them, you have Badar & Brothers whose Tokarev TT .30 cal has also BATFE approval and is being regularly exported to US
