It's interesting. It really depends based on what you define "intelligence". Because arguably, domesticated dogs like Jack are smarter and more suited to live in modern society. They're kinder and more perceptive of expressions and emotions than wolves. It would make sense he's smarter than other animals when it comes to logistics in this world.
However, Legoshi is arguably more intelligent in the more *natural* department. He's got better equipment to fight etc, so he would be better at physical activities.