Distinguishing Barred Rocks from Cuckoo Marans

[sdlacrow]

I ordered 5 BR pullets and 10 straight run cuckoo marans from feed store (think hatchery was Cackle)as well as some others. Ordered the marans because I liked the idea of the darker brown eggs but didn't realize that they were going to be the same color pattern as the BR's. Is the pattern different enough to distinguish or are there other size/shape/comb differences to be able to tell them apart as they get bigger/are adults? The chicks mostly look the same colorwise to me, but some (5 or 6) are a lot bigger and have slightly larger/blotchier white spots which make me suspicious that they are cockerels and therefore probably marans? They are only about one and half weeks old right now. Don't have any pictures yet. I can tell which are which with the other breeds I ordered but these guys have got me stumped. New to this whole chicken deal--it's amazing how fast you become a crazy chicken person. Thanks for the help everyone

 

[rodriguezpoultry]

The legs of the Barred Rock will be yellow, as will the beaks.

The legs and beaks of the Marans will be white.