the differences between the type III milled russian ak-47 and com-bloc ones vary from country to country and are mainly in small details, finish, furniture. the machining quality and parts detail level varies, also.
as more countries started to build the akm, more and more variations on the theme were designed and accepted as issue weapons.
see the threads on the hungarian amd models to see just how detailed just one variation on a theme got.
the yugoslavians, poles, romanians, bulgarians, east germans....they all became adept at both copying and customizing the kalashnikov to meet their individual needs. in my opinion, all of the various ak's reflect the metalsmithing and armory skills and attitudes of the particular country it was built in.
even the egyptians made an acceptable clone of the russian akm.