inferior. But it is a start. And I would not underestimate the Iranians. they build many anti aircraft missles' systems. And that gives them some respectful experience. In 5 years this system will be just as good if not better that the Russian one. Iranians have unlocked the technological code that many of the Arab countries did not. Which is: Just start designing and building and never stop. You will find that it is not that difficult to get there. When the US attacked Iraq. One of the major worries that many in congress pointed out about saddam is that he had a Successful R&D.
EU's Mogherini in Tehran to talk nuclear deal, regional issues (Reuters)
from the article: Iran: We've produced domestic version of S-300 anti-aircraft missiles