Manjaro XFCE with current home directory (Mint xfce 20.xx)

I had such terrific success installing Manjaro KDE using my Mint KDE 5.14 home partition, I am thinking about installing Manjaro xfce on our Dell Inspiron which runs Mint xfce 20.xx.

Can I do this using the current home partition?

Probably - but be advised that theme settings for Linux Mint requires the themes to be available - otherwise your Manjaro install will look very weird.