The feathering on the legs of the cochins is more complete around the leg. The brahmas only have feathering on the outside of the legs.
ETA: If you'll tell me what color brahma, I can post you a pic of a chick of that color @ 3 days old.
Quote:
Go to Murray McMurray Hatchery's website http://www.mcmurrayhatchery.com/index.html
and look up the light brahma. On the breed description page there will be a pic of a newly hatched brahma chick. Click on it to enlarge it.