I have the N and the C but honestly haven't don't a thorough testing of the two. I probably should now that I have the appropriate adapter and could do it on my NEX5, although that wouldn't be of much help in comparing the extreme edges. I've kept the C because it is a bit unique. It's marked "sample". 45/2.8C

You mentioned the holy trinity but personally I've been more intrigued by the 35/3.5 It gives a rather unique view. example shot at 35mm