I was browsing through Amazon catalog of running shorts and I noticed a difference between mens running shorts and women running shorts. The difference is how they make the bottoms. Take a look
The majority of mens running shorts were cylidrical and longer.
While the majority of women running shorts were shorter and curved upwards from the bottom.
Another interesting thing I noted was in a runners world article on running shorts, women who don’t like exposing their thighs prefered running in mens running shorts. I have also noticed all elite male runners run in shorts with a similar designer to women running shorts