It just ain't true. One of the traits you guys use to relate Smokescreen with Hot Rod is that he's young as if they were both born yesterday. And even if they were, they're not human so they don't have to learn how to walk, and speak to differentiate themselves. There's different kinds of behavior for youth. There's being innocent like Billy Batson and then there's being mischievous like Bart Simpson. I feel Smokescreen is like the latter and Hot Rod was bland in the cartoon. He acted older after becoming Rodimus. His personality was mainly constructed in the comics.