Diana,
I think Macook described it well by saying that they are, "different paths up the same mountain."
And yes, Macook, can be just like "regular stretching," however passive, sustained stretching also requires proper breath control. When I do it the emptiness and energy flow are the focus, as well as exploring the limits of how far I can stretch my limbs. Now then, does that get the label of Yoga? It is very difficult to know what a person means by Yoga since it has been so westernized.
Ultimately everything is energy, all we are working with is our intent.
So Diana, try doing both, pay attention and if you still feel unsure, then I would recommend choosing the one that you like better and stick with it. You will benefit either way.
Michael
