I have 20 bantams: 11 bantam easter eggers and 9 bantam blue silkies. S/R. All 5 weeks old and have been together and mixed since we got them. I'm planning on keeping them all together until I can afford to separate for breeding purposes, which may now be a year or maybe the end of the summer. So ... no clue how many are girls and how many are boys. Hoping they all figure it out because I don't want to get rid of any boys!
Your 2 should be good, especially if they are growing up together. They may, close to sexual maturity, have a little "fight" to figure out who's top roo, but otherwise, should be ok.
Just my 2 cents.