Just my thoughts. If I would import an aircraft and could choose between one made in the US by an amateur who has never built anything in his entire life, and with no requirements for QA during the build, or one made in Russia built by a team of proffesionals at a slightly higher price? I think the answer to that is a no brainer.
The rules and regulations are different througout the world. In Norway the main idea is that experimentals shall be 51% "self built" and that they shall be airworthy. During the building process, a certified mechanics will do the QA and sign off all the steps (as well as give lots of advice). Another thing is that I don't HAVE to build it myself, I only have to be the "project leader" so to speak. This doesn't mean that I can purchase a 100% finished kit from a manufactorer, because of the 51% rule, but I can hire some folks to do the actual building as long as I am in charge. The rules about importing a finished or partly finished kit say that I can do so, if I can document that some very basic technical requirements regarding airworthiness are fulfilled (no problems regarding RVs or any other well known kits).
So what would happen if I import one of those planes from Russia? I don't know. Obviously the 51% "self built" rule is not fulfilled in any stretch of the imagination anytime during the build. The Russian company is a manufactorer of fully finished aircrafts, no matter where they get their parts or plans from. On the other hand, if it was already registered in Russia that would probably make a difference (do Russia have an experimental class by the way?). I could also probably show, at least on paper, that I am the project leader.
I personally think the 51% rule is an outdated concept with no base in airworthiness or reality at all. Experimentals are sold and purchased, imported and exported in any state of completeness all the time. There should be only one rule, experimental classed aircrafts should not be used commercially.