Actually mate it's funny you say that. I've run a fair amount of Chinese E&S 3/8"LP and it is one of the best LP chains I've run - no joke! Their larger chains lack a few things but their 3/8" semi does actually hold a good edge. The biggest problem is oiling and despite the saws supplying HEAPS of oil it doesn't seem to be getting into where it's needed so under hard work they simply smoke up and stretch.
GB's EVO2 chain seems to be getting better and better but you quite often have to look at the experience of the guys praising some of this chain. I've had guys think the std 3/8" (non LP) By-Link/Tri Link chain is great but when I've used it it has been absolute garbage. Another problem is consistency - one roll may be good, the next roll is crap. They may have got some good loops and maybe I got bad ones. Or they may run saws for 30 minutes a year