What is different about him is that he doesn't seem to have intellectual curiosity.

DS8 loves learning despite his learning disabilities and will learn without a gold star reward. He watches documentaries, loves museums and applies knowledge in novel ways.

DD5 seems to view the classroom as just one of several arena in which to show off. I am thinking about signing him up for piano. He doesn't seem to have any special music ability. I'd like him to have to work at something.