I honestly dont know,tho one thing that would potentially point to it being a reverse/reengineered copy would be the new wheeled chassis,as it wouldnt make much sense for iran to simply rehouse the original tors on a new wheeled chassis as this would effectively be compromising their off road capability for no gain.
On the other hand,there have been 2 previous sam systems that iran rehoused on new wheeled transporters,one was the sa6,the other the hq7,however both of these were extensively modernized and in the case of the sa6 completely reworked,with no part of the original system left untouched.
If these are the original systems rehoused,then it seems a safe bet that these have been at a minimum completely modernised,which I think is probably just as well.