Can you tell these birds apart?

So I thought I would do, for once, a cross post from “What Bird Is This?,” another site that I contribute to (http://whatbirdisthis.wordpress.com):

I will now test your knowledge of sparrows. Both of these handsome specimens were taken on the same bird count last January in Stanley Park in Vancouver, BC. They are quite tricky to tell apart in this part of the world in late fall and early winter, especially for those of us used to seeing them out East (unless we see them together, of course, since one is noticeably bigger than the other). In this case, I would invite you to look at three important features to make you determination: the head, the bill and the shape of the spots on the breast. Good luck!