Flying Fish has an open kitchen so it's noisier and you can hear them cooking, watch them cooking. It's noisy. When you enter the restaurant, you are right there so from most tables, you will be noticing the traffic as patrons enter/leave. Also, the acoustics in here echo a bit with a high ceiling. Tables are pretty tight. It's not crazy noisy but it's definitely noisier than Yachtsman. The 2 top tables are pretty small and up against the wall unless you get seating at the chef's counter. I don't know if they have any 2 tops that aren't up against the wall because we've always been seated at one of them, lol.
We've eaten at Yachtsman about 6 times and we've always had quiet meals there. You enter the restaurant and kind of go around a corner past where the meat is stored so you don't see the traffic. Even at a 2 top, we didn't feel "up on the wall" the way we do at Flying Fish.
I would have no problems taking my toddler grandson (who is fidgity) to Flying Fish. I would not take him to Yachtsman.