Difference between mtb and road saddles?

[Flur]

I ride with a mountain bike saddle on my road bike. It's insanely comfortable (I don't even ride with a chamois) and doesn't look the least bit out of place. It might work you also as it's black on the top and white on the sides (I have white bar tape also - I'll post a pic if I can find one).

This is the saddle. It's a Specialized Ariel SL. Here's the black and white version.

And to answer your original question (oops!), there's no real difference other than length and that MTB saddles tend to have more padding. They come in a lot of the same widths, and I ride the same width of MTB saddle that I would ride if I had a road saddle.