I did not mean that those were the only two Brooks options -- I meant that a Ruby saddle vs. a Brooks is not her only option. There are hundreds of saddles out there -- TE sells a bunch specifically for women! -- and I'd try some of the others before putting a Brooks on that particular bike.

It's just about impossible to recommend a saddle for somebody else, but based on your description of your physique, I think you might like the Vitesse. There is a thread about it here.