I've posted 2 drawings of the same model from the same pose. Both were demos from my class at DuCret School of Art in Plainfield New Jersey. I use the term "Demo" loosely, I didn't stop the class to do the demo, I often times do these in one on one instruction from the model. I try to find what that particular student needs to see at that moment and just go with it. Sometimes that means doing a little demo, other times it will mean a walk to the library to look at some work by other artists that illustrate the concept we are discussing.
The model who posed for the class the day I did these sketches reminded me of characters I've seen in Western movies. Something about his facial structure and the mustache put me in that mindset. One drawing shows our model Jim pretty much as he appears, the other is Jim reimagined as a character from a western.
I used "artistic license" to change just a bit of what I was seeing to convey a narrative element.