“Im told that the best printed Shahnameh are from Moscow”
I’m wondering who told you that, and in what context?
“and the best movies made based on Shahnameh are Russian also.”
And, to which best movies you’re referring?
If you look at where Ferdowsi is from, and the history of that region, it may make more sense. Also, since Iranians don’t trust the regime, the best versions along with the movies (and some of the most expensive printed books) are considered from Moscow.