Are you SURE the geometry is the same? When I bought my Fisher hybrid I test rode Trek 7200 (2004 ... maybe 2003) and a 2002 7100. I thought there was a difference in stretch between the men's and women's. The step-through felt like the handlebars were closer to the seat. I liked the more stretched-out (not much stretch mind you) position on the men's model even though I'm a woman (fwiw). I didn't spend a lot of time on adjustment on these ... maybe they were adjustable stem differences or something. I found the Fisher an infinitely better fit for me. And I did get the step-through for riding in skirts.
Maybe the huge difference was on the Cypress??? It's been a couple years. But, since no one had answered you yet, I thought I'd jump in.
It should be pretty easy to measure on the bikes themselves. Ride them all!!!!