Hi Ann! My husband and I have been House of Blues fans for years but our 9 and 11 year old were not as into the menu as we were. We took them to Fulton's Crab House last year, and they both loved it. Fulton's has a much more traditional menu of seafood and steaks (for dinner, lunch does offer some sandwiches) while House of Blues offers more spicy/cajun items in addition to burgers and sandwiches. They also loved the setting of Fulton's, inside the ferry boat with water views. That said, your daughter might be more interested in the art and music in addition to the food items at House of Blues, so that may work for you.
My advice would be to check out the menus for both
Fulton's Crab House and
House of Blues (menu links are on the right of those pages) so you know up front which appeals to your family more. If I had to choose between the two, for food quality and memorable experience, I'd go with Fulton's. You can always head over to House of Blues to check out the decor and merchandise too.
I hope that helps with your planning, feel free to come back and ask us any other planning questions you may have.
~Suzannah