Pak Nam Thai -- new Southern Thai in the TL [San Francisco]

You pose an interesting question about “Kao Lao Nam Tok.”. I believe “nam tok” means that the broth is thickened with blood (which is also common with Boat Noodles). Perhaps “Kao Lao Nam Tok” is just to distinguish the beef version of Boat Noodles from the pork verssion. Is there much difference in price?