So I did a little experiment the other morning. The first two pictures are with northern exposure light. The last two pictures are southern exposure. They were taken at the same time of day. All were shot in shade.
(pssst. Here's another quickie tip. Don't make the same mistake that I regularly do: if you use autofocus points (which I highly recommend), then be sure to focus on the eye closest to you, NOT on the eye farthest from you. Doing this will give you a greater likelihood of getting both eyes in focus.)
Hmmm, I definitely like the Northern Exposure lighting better on these. It just seems somehow richer.