This is too objective of a topic to really narrow down the right answer. I'm going to go with driver IQ for my example. In their rookie years, almost everyone thought Jr. was going to pummel Kenseth, but Matt showed maturity beyond his years by taking care of equipment and racing smart. He's still a good driver, but his age is showing. The thing with Logano, and he's involved in a lot more wrecks. He used to be able to salvage an otherwise bad day. I'm definitely not saying Kenseth has the best driver IQ, but he was pretty good back then. I lost all respect for him when he dumped Joey....and I'm not a fan of Beavis Logano.