What would be really remarkable, in my opinion, would be to see how drastically he could change his entire tone and demeanor. He always seemed to have very exacting control over both, and I suspect he could very easily project a different sort of character if he wished.
One thing that's really remarkable is just how much a different demeanor can change a person's appearance. For instance, I have even seen some screenshots of Dukat that are virtually unrecognizable at first due to the change in demeanor that he has in his few "good" moments.
Also, to give you an idea of what I picture as this AU Archer's basic look and demeanor, I found this pic of Marc Alaimo that is amazing for how different it is from how Dukat carried himself...