I will not agree to making one speaker sound like another similarly designed speaker by way of EQ alone. Even if that were the challenge, specific drivers can be different as according to the magnets used, surround material, cone material and more. How would you replicate 'speed' or even extension if a driver simply cannot comply? In some cases, it would more likely become attainable if certain speaker parameters were derivable.
Having said this, I used a program that tried to do just what you asked. I'm sorry, but I forget the name. Point was that not only EQ was used, but variety of other changes were produced with this 'program'. The trouble was, even though the different programming made my speakers/headphones sound different, I could not say as to how close they came to the replication of a chosen speaker or concert hall, etc.
It was fascinating to be sure, but because I am not very good when it comes to technology, frustration won over curiosity.