Now I say this very hesitantly but I think hens of either cross are usually fairly light in color with very little light barring. I’m very very hesitant to say this though sine I’ve never owned either cross and have only seen pictures. The fact that the rooster is a cross also complicates things some.
Since these should be sex links pics from shortly after hatch might actually be helpful. Someone who has actually had either cross will be much more helpful than my possibly incorrect stumblings. My only real experience is with pure BRs, BR/Australorp and BR/RIR which are birds of a different feather literally.