I have a dual boot setup for Manjaro GNome and Cinnamon. No problem with either one works perfectly easy to do.
Where I am running into not so much an issue is on the Boot Loader. So I can tell which one I am booting to.
Where is says
Manjaro Linux change to Manjaro GNome
Manjaro Linux (18.0) (on /dev/sda1) change to Manjaro Cinnamon
Also want to change the Advance options for …
Did it once by manually changing it in the grub.cfg file and it worked until updates were ran and it also updated the boot loader and it changed them back.
What I am looking for is how to make it permit (if it can be done).