You seem to enjoy bringing up subjects which I would love to debate you on, but which are not the topic of this thread
so as to the contents you posted about the topic at hand...
So, does as you say, being the messiah or Son of God automatically mean He has Full Authority? Let's see what the scriptures tell us as to when Jesus was given such authority. While either He had the authority already BEING the messiah and Son of God, or that He was GIVEN the authority at a certain time WHILE BEING the messiah and Son of God...
AFTER His resurrection, and just before Jesus returned to heaven, He told the disciples, “All authority in heaven and on earth has been given to me. Therefore go and make disciples of all nations…” (Matthew 28:18) Then, in Ephesians 1:20-23 we are told that when God raised Christ from the dead, He “seated him at his right hand in the heavenly realms, far above all rule and authority, power and dominion, and every title that can be given, not only in the present age but in the one to come. And God placed all things under his feet and appointed him to be head over every thing for the church, which is his body, the fulness of him who fills everything in every way.” If Jesus is presently head over the church, he is also head over all authority, power and dominion.
And that happened AFTER his resurrection, when He returned to heaven to receive the glory He once had with the Father. This is confirmed in 1 Peter 3:22, where Jesus Christ’s resurrection is said to save believers, and that Jesus “has gone into heaven and is at God’s right hand – with angels, authorities and powers in submission to him.” Jesus had to relinquish the glory and power He had in heaven before His incarnation, and He told His disciples that they were keen in seeing Him with the glory He once had. That is in His prayer just before the crucifixion, in John 17: “And now, Father, glorify me in your presence with the glory I had with you before the world began.” Jesus had laid down His heavenly glory and authority in order to become the suffering servant, and AFTER His resurrection, He was given all authority in heaven and on earth.”
So no, Jesus didn't have the Full authority just because He was the Messiah or the Son of God, as scripture dictates that He received it after the Resurrection. So again, Jesus (before he had full authority) rebuked satan, but Michael (an archangel who also didn't have full authority) could not. Not the same I'm afraid my friend.
And Michael is called a Prince, yes He is. Jesus is called the Prince of Peace, yes. Does that make them the same person? If you read in a novel that the main character walked by a Policeman and a chapter later, he walked by another policeman, would you automatically assume they were the same person because they were both cops? Especially if one was a lieutenant and the other a captain? Of course not. Just sharing a title doesn't mean your the same as someone else right? And as for Jesus, He is also the King of Kings which is far above a mere chief prince, who is among equals.
And finally, your position cannot be true because it means that the nature of angel ceased to exist and that it was somehow changed into the man Jesus. But an angel and a man are completely different things. Identity is tied to the nature of the thing so if the nature ceases to be, then the identity also ceases. Therefore, it would mean that the Jehovah's Witness position would violate the continuity of identity between Michael and Jesus. It cannot work and is not true.