With my limited experience I can't see much difference between the two. The only thing I have seen/read is that there are a few things different with the software included. Other than that I think it is just the way it looks and being heavier on graphics. I'm sure cat1092 that you know more than most just from what you have read about it.
pcpunk, actually you're right, I do know a little more, have tried it, the screen has a jerky feel to it, like it's highly sensitive, maybe this can be adjusted in the Settings. Though this was only in a Live session, have only installed Cinnamon once, that was version 13, and in a VM. Back then it wasn't as mature nor popular as now, and for obvious reasons, Cinnamon, developed by the Mint team (though can be added to Ubuntu & possibly related distros), was still a work in progress, and to some extent, still is.
I'll likely try it on on a different computer with a not too old graphics card from 2012 & see how it runs now. Then when Mint 18 is released, can make an informed decision based on first hand experience. I don't want my main Linux install at this time to be a learning one, that's part of why I keep different computers, to have for practice & learning. Just like my main installs, these are imaged at least once monthly, so can get back to where I was in a few minutes.
One may soon become a dedicated 24/7 non-stop running Firewall appliance, if I can figure out the details to set it up & all, just need to install an outbound Ethernet card to connect my router to. This is far superior over the Firewall that's built into routers & gives the one in control over it total control over what content guests & different Users can access. It can also be used for parental control for those with children, which is brought up from time to time on the Forum. It doesn't matter which OS is being used, a Firewall appliance provides total control over what those on the network can do.
Many businesses has such an appliance to keep employees in line, home users can benefit from the same technology.
Cat