I myself saw the game of Hazard in Real Madrid was very different from in Chelsea, I prefer to see the game of Hazard in Chelsea because it gives a good performance for Chelsea so that the hazard became a lot of targets of big European clubs, but after moving to Real Madrid I did not see the danger showed what is the best performance for real madrid maybe because in real madrid there are many other rival players so that it does not contribute fully.
He was more "free" at Chelsea, something that it is not happening in Real right now.
His play style is more conservative in order to fit the moves of other players.
I don't think that he is going to be a legend at Real Madrid. On the other hand, he is going to be a Chelsea fan for sure as he achieved a lot of things with Chelsea, and will not achieve a lot with Real...
Maybe it could be a pressure on Hazard because his style of play is not so aggressive that he is more confined by opponents, in Real Madrid many core players become difficult for Hazard to play for the main so that Hazard does not dominate for Real Madrid.