DP Timur Civan -- owner of both a Sony F3 and a RED Scarlet -- does a side-by-side comparison of the two cameras focusing on skin tone and still-life. Identical lenses were used on both cameras.
His conclusion? "I find myself shooting films and documentary on the F3, but commercials, music videos, and corporate spots on the RED. When it needs to look natural, I use the F3. When it needs to look crisp and slick, RED."