I think I'm gonna have to go with Diho, just because they're bigger and therefore have more selection.
But SF's selection of meat scraps were impressive. I know where to go for raw beef cankles and chicken feet now. They also have lots of seafood, fresh and frozen.
They were fairly organized and uncluttered.
There were a few things I couldn't find here. Normally when I go "Asian" shopping, it means I'm Japanese shopping. Their Japanese selection wasn't so great.
There's nothing that SF satisfies for me that I can't get at International Marketplace or Diho. Oh, except maybe for the beef cankles.