Could anyone help me out? I have 8 buffs and this guy / gal is the only one that looks different... I feel it has the head of a rooster but acts like a hen with a busy butt...
I would wait a few weeks and worry about re-homing when (if) you start hearing crowing - while I agree that is a lot of comb for 10 weeks, I am not convinced that this is a rooster just yet and would hate to see you re-home a pullet in error. Here is a thread in which I had concern about my own BO who was then 10 weeks old - https://www.backyardchickens.com/t/885682/10-week-old-bo she is now 22 weeks old and the best layer I have so far. While her comb is a bit smaller than your bird's, I am not entirely convinced and try not to answer based on just one characteristic, and am not seeing any other tells just yet in this bird - which is what a few more weeks can give you. Worst case scenario you start hearing crows or see further development and then re-home the bird.