I'm sure these aren't the last of the colours to be launched for the various Twelve models, so maybe your preferences will be served in the future.
I've previously spoken to Will Brackfield (CW Designer) about this, before launch. The more severe gradient on the 40mm Ti model is to help reduce the apparent size of the dial, i.e. make it wear a little smaller. On the 36mm Ti this isn't needed so much as the dial is smaller to start with, hence the gradient is less severe, i.e. not tapering away to near-black. It's nothing to do with gender. Hope that helps.