This is kinda a loaded question, because when you talk about "foreign" gear, you can get anything for legit to crap. Suffice it to say, most foreign gear, especially legacy com-bloc stuff is of a different quality than US issue gear. So sticking to just GI stuff, I'd say there is a very different design philosophy between com-bloc and western stuff in general. Much the same as weapons design, you have "goodinov" versus a set quality std. If you take this into account, then something mass-produced and designed to be disposable in the meat grinder of war, versus semi-custom gear made to last, then you can maybe look at it for what it is, rather than compare it to a much higher std, for which it was never designed.
That being said, if you are looking for foreign alternatives to US-made gear, then there is actually some good issue kit, especially from some Commonwealth countries, that is head and shoulders superior to US-issued kit. I am speaking mainly of issue "Belt kits" or "belt order" and full sized Bergens. Not to mention smocks, bashas, etc. These countries also have their custom and semi-custom makers with kit on par with our best.
But the same problem remains, in that they have their cheap knock-off stuff, the same as us. And a lot of their issue kit is crap, same as ours.
So I would say it's not a matter of whether its foreign or not; it's a matter of if it's of known quality or not.