^ Make sure you are quarentining the new additions separate from each other.

BCIs include Colombians and Central American boas among others. BCCs are "pure" red tails and include Puruvians and Surinames (also among others). BCCs usually grow larger than BCIs and BCIs are more common (usually sold in pet stores). BCCs will cost more than BCIs as well (unless you're getting into the expensive morphs of BCIs).