Student or Learner
Sentence:"I agree, market experts and journalists are indeed the most informed and intelligent people in the world/on the planet"
My question: What is a difference between these expressions "in the world" and "on the planet"? Are they same? Are both correct in the sentence? I know at a time only one expression can be used in the sentence. I just want to their meanings, difference between them and they are correct to use in the sentence or not.
Regards and thanks