Hi, Jorge
I think one person said it best this way:
“Think of it as the dashboard and controls in a car.
They all have pretty much them same gauges, buttons, and switches–but they are located differently–that does not mean you can’t drive the car.
Same with the desktops–you can drive them all. Which do you prefer?”
Cinnamon is weightier than Mate or Xfce. Of course, if you have a modern pc with plenty of RAM, that might not be noticeable. I certainly do not notice it.
LMDE is a Linux Mint distro that is pure Debian base platform vs the other three which are based on Canonicals, (Ubuntu), platform.
Sheila