Good post. I doubt there will ever be another Mozart. If this kid is just writing slight variations of the melody for different instruments then he is not on the same planet as Mozart.
The stuff Mozart wrote in his early teens was far better than most great classical composers best work. Young Mozart apparently learned much from Bach's son J.C.. J.C. was a pretty good composer with wonderful music but he did not have the depth of his father or Mozart.
Mozart was a once in 1,000 years phenomena.
There is a link in the thread to his piece. That's what I listened to. Anyone can hear the same thing. It's not difficult. It's straightforward. The kid is playing the same melody on different instruments.
Folks, music isn't opinion. If it was purely opinion then universities would not have spent the billions of dollars in sum over hundreds of years to teach it. If it was opinion, what would there be to teach? There are objective techniques and aspects to it all that are concrete and teachable.
This young man is writing a melody and is able to write it for various instruments, and that's a nice thing for him to be able to do at age 10 or 12. But he is not merging multiple themes from those different instruments into one output that has some thematic coherency. And no, thematic coherency is not some touchy feely phrase that means nothing. It means that some underlying tune, or technique, underlies it all and holds it all together.
This young man has everything holding together because all the instruments are playing the same tune. That's not coherency. That's just a child writing music.
You don't have to be a music expert to hear this. The comparison with Mozart makes no sense at all on a purely objective measurement basis. Mozart's work at the same age is in a different league. Mozart was so far ahead of the world that he added phrases that merged with a whole just as a joke. He added phrases that sounded like human laughter, and made it fit the melody and conform to theme.
This young man has a very long distance to travel to the destination of Mozartville. Mozart had already arrived there at younger age, had taken up residence, furnished the rooms and was hiring painters for the exterior.
BTTT