They do different things. Mine lets you treat a note as if it were a folder, xpgo’s lets you treat a folder like it’s a note. 
What’s the difference, you may ask. Well, mine means you can move or rename a note using its title pane and the move command, and the folder (and any contents) will move along with it. (I like this because I normally rename and move from the notes, not the file manager, because I prefer keyboard commands to mouse ones where practical.)
xpgo’s on the other hand, will hide the note in the file manager and open the note if you click on the folder. It should be compatible with mine if you set it to “inside” mode and disable its autorename function. (Which is the only part that conflicts with mine.)
So yes, you can use both, you just will likely have problems if you don’t use compatible settings for xpgo’s, because its autorename renames the note to match the folder, and mine renames/moves the folder to match the note. Mine supports link auto-updating in such a case, and xpgo’s does not. So having both autorename functions enabled at the same time is likely to cause problems. xpgo’s plugin has other features besides autorename, however, that you can still use, while mine is like 99% autorenaming by volume. 