Its definitely not a buff orp. You can post at "what breed or gender is this." Someone there should have a good idea. I think it may be a male sex link- which is not a breed but, more a designation.
Hello and Welcome To BYC! ... you can post pics in the What Breed/Gender forum for help with figuring out what your birds are www.backyardchickens.com/f/15/what-breed-or-gender-is-this X2, the red/white birds looks like a red sex link, female, they are sold under a lot of different names depending on the hatchery
Welcome to BYC. Glad you decided join our flock. You definitely have Red Sex Link pullets, which are laying machines. You should get loads of eggs from those girls. ) Please feel free to ask any questions you may have. We are here to help in any way we can. Good luck with your Red Sex Link pullets.