I can't comment on the Super Fine, but I've been using the Tamiya HG Trigger for the last five years, and I love it. It's not touted as being able to create the thinnest lines, but it has done everything I've asked of it so far, flawlessly. Not a peep of trouble!
So, the Tamiya ABs are actually made by Iwata?
Then, kudos to Iwata! I've always heard they were fine ABs, too.