Yes, and there is a definite hierarchy to the fish sauces... My local asian market has probably 7-10 brand of fish sauce on the shelf at any time....
I once asked someone who I thought would know more about fish sauce than me (Im caucasian, the person I asked turned out to be from Laos)
He said the lighter and clearer the sauce the better... and that sauce like that is more expensive.. but this is all relative..
I bought a bottle of Tiparos from Thailand last week for $1.29... allegedly the fish sauce "nuac mam" from Viet Nam is among the best...
Wierd I wont eat stinky tofu, but I have no issues with a tablespoon of rotted fermented fish in a meal