No doubt with Mbappe performance and actually he has higher level than Messi or Ronaldo, but joining with bigger team has chance for Mbappe will get better achievement in the future.
Still unclearly with Mbappe future will stay with PSG or join with Real Madrid, I can't speculate Mbappe will join Real Madrid because he was ever reject with Madrid offer last two years.
Whether you exaggerate or not, but to compare Mbappe with 2 football legends, it's still not worth comparing at this time. Mbappe is still Mbappe still unable to reach the level of Messi or Ronaldo. That is if you understand how football works today.
We'll see at the end of the transfer market session, however, Mbappe is still enjoying his drama with PSG. Success or not to Madrid is clear we will get unexpected news. Especially when Liverpool came to be a competitor who at that time was ready to make an offer. but as everyone knows that Mbappe is still closer to Madrid.