I had been following this thread closely since I started to develop saddle discomfort this summer. I feel pressed time wise to find a solution since I leave in March for my cross country bike tour.
I liked the Affinity on my Ruby, except it was too narrow in the rear at 143mm. After sitting on the Specialized sitbones-meter, replaced it with a Romin Evo 168mm and loved it. Felt good for a long time. But then began getting pain and numbing. It felt like where the Romin narrows from the rear toward the nose, began compressing the nerves on my left side in the crotch during pedaling. I thought maybe the 168mm may have been too wide for me. Replaced it with the SMP Dynamic and that felt great for awhile. But, the same pain later developed. I realize that menopause is at work thinning tissues and losing natural padding. I know I swapped out with totally different styles of saddles, opposite of ny biker! So, I went back to the original Affinity and measured the area that narrows from the rear to the nose and compared it to the Romin and SMP and see that it is narrower. The Romin and SMP were the same width. I ordered a 154mm Affinity off ebay and hope that works. But now I am thinking of ordering the Diva as well, to compare, comfortwise.
I do find it feels like I have better support on a saddle with a flatter back, and having a narrower transition to the nose. I saw one photo that makes the Diva appear to have a flattish back. Emily, you probably don't actually have a caliper to measure, but even if you have a ruler with mm, could you *please* measure the area before the nose-- that would have contact with your inner thighs. I would really appreciate that.