Just curious, is there any difference between men's and women's snowboards besides the graphics?
Construction wise? Not really... Although women tend to have smaller feet for the same weight person as a guy, so they tend to be more narrow, and available in shorter sizes.
Nothing wrong with a girl riding a mens board, and a smaller guy riding a womens board.
I believe they also tend to make them a little softer than their male equivalent. Here's Priors comments on the Brandywine, their female version of a freeride board:
"The Brandywine, Prior’s high performance, directional freeride board for women, draws a smooth, stable and fast line through all snow conditions. With a narrow waist and softer flex
than the Men’s Freeride, the Brandywine allows women to drive the board harder and maximize energy transfer for the best ride possible."