I'm using SFS. Others prefer PFS.
It's more a question of personal preference as both do fine. I've used PFS before it became available for free.
Did not make a big difference.
From my experience, stick a note to the drive or somewhere in sight what filesystem is installed in what flavor.
Once i had problems to recover rdb. I had forgotten which fs was installed.
Needless to say i f*cked up entire partition table and disk on my attempts.
