I noticed the ground beef from one store has a red colored outside, and a darker interior. Whereas, the ground beef from the other store has a red color through and through . Neither is displeasing in taste; I will be conducting tests on the flavor later in the week, to see if one tastes better than the other. What might be responsible for this color variation? Is there a scam going on here? By looking at the different kinds sold, the higher the fat content is, the darker the meat, right?