Am I limited to only those two choices? LOL
Are you only getting six hours sleep because you are eating 11 times a day?
And, what are you doing with those extra two hours?
I don't believe eating 11 meals a day is important to building muscle.
I also would rather only sleep six hours a night and spend the other two hours being productive and/or enjoying life.
But if those are my only two choices, I'd say sleep for eight hours and get you daily total calories in fewer meals.
Train Hard. Think Big.