Yan ji has opened several branches now but it's always good to come and try the OG one. While it's franchised it seems that the owner of this stall isn't actually related to the rest, she mentioned that she doesn't know how the rest taste.
Rest assured though, having tasted both I would say it's very similar. The original is salty and that's why there isn't too much broth, while the other branches give as much soup as you expect for a normal seafood soup place.
Otherwise the seafood is always cooked to perfection, the soup actually takes a back seat and becomes more of a gravy for the rice, and the meatballs with dried solefish are as delicious everywhere
Not only is this place the OG it's probably also the most affordable. That said you're paying for Aircon and more soup at the gourmet places