Hi Scubamom,
I tried both lower end versions (men and women's) they go for about $70. They only difference between the two of them is the width of the saddle. Measure your current saddle and order one which comes closer to the size of your Butterfly. Just make sure that your butterfly fits your sitbones, so I would remeasure them too and make sure that you have one cm extra on each side on your new Selle SMP. These saddles are great for pain elimination in the front, unfortunatelly I had to get rid of them because they chaffed me in my leg crease. Hope they work out for you.
Good luck