Difference between mtb and road saddles?

[tantrumbean]

What exactly is the difference apart from road saddles tending to have a longer nose?

The (men's) saddle on my new road bike is killing me - after about 15 miles it feels like my girly bits are being sandpapered, which is not a particularly pleasant experience. I'm wondering if this is to do with leaning over more on the roadbike, i.e. more pressure at the front, but whatever it is, the saddle will have to go.

This causes the following problems: a) I'm extremely skint at the moment, so lots of experiments with expensive saddles are out of the question. b) my choices are also limited by the fact that my sense of style, the colourscheme of the bike and the current white bar tape will only allow me to have a saddle that's either white or contains a large amount of white.

For some reason, there don't seem to be that many women's specific ones about that meet the criteria and all the designated road bike saddles are even more expensive than potential mtb options. I have found a reasonably priced black and white mountain bike saddle, that would LOOK ok on a road bike, but I'm a bit worried that there is something fundamentally different between the way road and mtb saddles are shaped, which means my riding position might not be suitable for this saddle...

Sorry, this is rather convoluted, what it boils down to is: Can someone tell me if, apart from nose-length and name, there are any other differences that I should be aware of?

Thanks!!!