Sure they have. He's got much better boxing skills which is the most important part of this fight. Not only that, he's got better overall movement and footwork while striking. That's in addition to speed and power. In a fight that will likely be standing, that will be crucial.
Stylistically, Tom has exactly the style that has given Jon problems in the past with Gus 1 and Reyes, two of his closest fights. Two fighters that match his size and length with better boxing, speed and movement/footwork. Difference is that Tom is a true HW, has a size advantage and much more power. Not to mention the prime and youth factor.