If that's what they are, the rir/bo cross, they're nice looking birds from what I've seen here. It seems to be a pretty popular mix and you get nice sized orange-ish birds.
I agree they're not right for SS chicks.
the wing feathers look like yours just the brown is a bit lighter. the beaks are the same color so are the feet. hell i dont know. maybe they are sussex mix. the person i got them from swears they are pure.
These are classic Speckled Sussex chicks...yours are not obviously. RIR/BO ought to be good layers though not Speckled Sussex that you bought.
Lady of McCamley