I too have made a quilt using both fabrics. The only thing I would add to the answers you've gotten so far is to wash both fabrics first. That way any future washing won't affect the quilt.
I am a pre washing fanatic anyhoo. But I have seen issues with non washed fabrics, besides it making me cough and sneeze when sewing or sitting beside someone with unwashed fabric. Classes are a challenge for me, I always cough and sneeze throughout the class.