From what I have seen, SR-101 patinas very well, but typically with various gray tones.

A2 seems to have a much more colorful patina - as I mentioned above, I have seen blues, yellows, golds, oranges, etc in A2.

Two of my favorite steels with just subtle differences in function. <img src="/ubbthreads/images/graemlins/thumbup.gif" alt="" />