This in a feature article from the American Conservative:
Here’s one difference between Rand Paul and papa Ron Paul, says mama Carol Paul: her son is funny on stage.
“Ron doesn’t do that—he doesn’t tell jokes,” Mrs. Paul says of her husband of 53 years. She recalls a lively speech Rand made for his dad in New Hampshire on the 2008 presidential campaign trail. “He was so personable—it tickled me to death.”
Bingo. Some of the “perceptual” type differences I was thinking of here.