I hate to bring this to you, but Fuji iso is not the same as sony iso.
I think sony iso160 is about the same brightness as fuji iso100.
You might want to check out a conversion chart.
Fuji also applies extreme processing to their in camera jpegs. There is some slang word for it that i can't recall atm.
Sorry but I'm already aware if that. Not enough to matter and had nothing to do with the grain itself.
As you might notice by re-reading what you just responded to, raw was in parenthesis in the same sentence.