What is the difference between the Taylormade Burner and the Burner Plus?

I went to the Taylormade website but was not able to find much help as to the difference between the Taylormade Burner and the Burner Plus.|||Just bought some. The Burner plus have a larger MOI and higher COR than the straight burners. Basically they are a little more forgiving but you loose a little feel. You can't have it all. Great clubs though.