i have both along with several other tangs. I had the blue with a yellow in a 55 when i first started, they got along fine, then went to a 240 still no problems, then got the 310 and got rid of the yellow tang in the process, kept the blue and added another yellow tang and the blue never bothered him. I got rid of the old yellow cuz he had some top fin damage from a disease he suffered in my 55 and it never grew back. Just some info for ya.
I also have a sailfin and an achilles tang along with these two guys no problems ever.