I can see the resemblance, in that both 4th Edition and Exalted offer rigid classes with over-the-top action. As far as mechanics go, it’s probably as easy to convert Exalted to 4th Edition as it is to convert Exalted to anything else, which is to say, not very easy.
However, my opinion of Exalted is that converting it to 4th Edition can only be an improvement, of both game systems.
Actually, I’ve been buying the Exalted books with an eye to converting them to other game systems. The most likely prospect is converting them to D6 Space for use in a Battlestar Galactica story arc—converting the Realm to an interstellar empire that the Galactica needs to travel through.
But I can see how 4th Edition is closer to the “Exalted Spirit”.