hi Mayo, welcome to TE
If you are comfortable with that saddle, why change? I do agree about the men's version, the regular B17.
i would never buy an "s" - I actually think it was a stupid move of Brooks to start manufacturing them again, since no woman I know wears a voluminous dress while riding!!
Tell us more about how you ride or plan to ride. and really, if the B17 is comfy, stick to it.
I love my B68 imperial. I tried a b17 and it just didn't work.