Looking at those photos, I now think the Brahma is a male.No crowing yet from either! Here is a better photo of the Brahma aka Yolko. I was noticing the saddle feathers and sickle tail which made me concerned, but I would be thrilled if this was not the case! I would really appreciate your opinion...
Photos from different angles can make a big difference to how a bird "looks," and of course your first photos were meant to clearly show the Barred Rock, not the Brahma. Sorry for raising your hopes there