I'm not sure if I completely understand your question. Both drawings reflect life drawing skills, just different interpretations of a similar pose.
Personally, I prefer the first shorter pose, as the construction lines seem to give it life and the expectation of movement, while the longer pose, while beautifully drawn seems a little too static and illustrational perhaps, as if you redrew the original figure at a later date. But that is understandable as it is your style and the type of figure that you are more used to depicting I think so your comfort level may be in the more streamlined version of the drawing.
In the life classes that I go to, my drawings are loose and quite different from what the tighter drawings that I usually do. I use huge sheets of newsprint and thick chunks of charcoal. We go from 1 minute to about 20 minute poses for a couple of hours, so I never get to develop a very detailed drawing such as this. Nor do our models have as sculpted features as yours does