If I may be more precise, the one on the bottom is Clearface Gothic. This reminded me of a recent fascinating thread involving Phil Martin's Agenda, which was a Clearface Gothic spinoff/enhancement, but I don't think it's the answer to this post.

After consulting with the Sans Serif ID Guide I came up with FF Dax, which I think is your mystery font.

Try FF Dax



Here's the link: FontShop

-Addison

Thanks. This one was driving me crazy.