Congratulations on a fine bull. I've taken many bulls too, all in Alaska, and have found all of them to be mighty toothsome.
I don't know anything about elk and have heard that old dominant bulls might not be good table fare. Again, I don't know that to be true but have heard it from more than one person.
The same is not true for moose. I can testify that based on my experience ALL bull moose, be they old or young, provide excellent meat that is tender and wonderful if properly cared for up front.
Bottom line - like Biggie and Marty said - any legal bull moose is an excellent trophy and the meat is very hard to beat.