[Dovecot] LAYOUT=fs vs LAYOUT=maildir++ and quota

Hi everyone.

I'm confused about LAYOUT=fs...

Does using LAYOUT=fs breaks maildir++ quota, if I use this quota scheme?

What are the advantages anyway of using LAYOUT=fs vs LAYOUT=maildir++ ?

(it's not important in my case if users can't create folders with dots '.')

Thanks in advance,

Ezequiel