I have an 27' iMac 3.20 Ghz i3. I would like to know the difference between that chip and the 3.33 Ghz C2D. faster? slower? better ? I feel that I made a mistake trading in my 21.5" 3.33 Ghz C2D for the 27" i3 3.20. explain why is it better or not, in detail. If someone would, I would so greatly appreciate the education and ease of mind.