My experience with RBA is that scopas tangs seem to enjoy the treat. I'm 2 of 2 with them. My RBA would grow in clusters, on my rocks just like GBA, when the algae got big the surface changed color to silverish, and it grew reddish dimples.
I have a very small tank and resisted the urge to buy a tang for nearly a year at one point I put all my rock into buckets and blacked them out for a month with no luck. The first scopas cleared almost all of it but I moved and decided to trade him to a local hobbiest. The algae returned and I got a scopas tang from ARC which cleared the second outbreak. I have one remaining patch which is curiously growing on the side glass. It's actually growing in a film like cyano and then the bubbles rise randomly in clusters. Because of this I don't think manual removal will help.