From my experience, Cinnamon is definitely highly immature compared to KDE. Very poor support for virtual desktops is the thing that jumped out at me most. There were also some problems regarding shortcuts and/or keyboard layout I think, and probably others, but I only played with it for a couple weeks while limited to LiveCD.
To be fair, Secure Boot is actively hostile toward dual-booting in the first place. Worst of all, it might seem to work for a while then suddenly start causing errors sometime later.