Not totally sure but the bottom one looks like old english game and maybe a frizzle and top reminds me of a bantam buff Brahma. Would need to see them a little older to really tell
I have looked at some pictures to identify the ones I have already, but these two have me puzzled. Might be waiting game until they are older.
I think the black one does have the build of a game bantam. He stands rather upright compared to my other chicks.