Probably Messi will have to change the way he plays, like Ronaldo did. He is not on same team, not in same league and he doesnt have the same age. It seems that he wants to play the same way on different conditions. Lets see if its adaptation time or something else

That is not that easy. You could argue about which one is better, Ronaldo or Messi, but you can't really argue the adaptability since Messi only played for Barcelona whereas Ronaldo played for Porto when he was young, then United, then Madrid, then Juventus and now United again and under so many different managers as well. All in all I would say that it is clearly a proof that Ronaldo could play anywhere and be good.
Messi is unknown on that front, he only played for Barcelona which is a great thing for loyalty and all but then he needs to prove himself to be worthy at PSG as well, he is still a great player no matter what happens but I believe that between getting older and playing in a new team, things do not look like it could be simple for him.