What's better again in ML? I have no problems with Lion...and please don't come with iOS crap. Other than AirPlay Mirroring (for limited things) and decreased Radeon performance, what else is there? Virtually nothing.
The best thing about Mountain Lion is not the features, but the SPEED, STABILITY and BUG SQUASHES.
That said, I found a really NEAT feature when trying to use screen sharing with an iMac at work -- it asked gave me the option of connecting to the iMac SIMULTANEOUSLY as my co-worker was using it. YEP -- basically I was browsing and using the computer while she did -- two different desktops. Wicked. It didn't work on my mac mini at home though -- perhaps requires a minimum i3 processor... now if only I could find out what that darned feature is called!! It sure wasn't advertised!!