If you fit in the dragon well you probably won't fit in the agent 80. Wayyy different fit. Really wide and roomy. If you really want an agent boot you should go for the agent 110, as it's the same basic shape (same shell I think) as the dragon series, just more park oriented. It's more expensive than the dragon, so I don't think you'd want to spend that much on a second pair of boots.
And the liner in the agent 80 is one of the worst ones tecnica makes.