I'm assuming he's laughing because of the difference in frames between the SuperSix and CAAD10 (I don't know how different they are being a Specialized and Felt guy). The CAAD might end up riding quite a bit different, because it isn't the same frame.

Unless you plan on racing or going up mountains a lot, I think I would go with the 105. You could save more weight on a great wheelset. Although... There is the bling factor which could matter to you And you do chop some weight off. Thus, why I went with SRAM Red for my TT bike. Weight and looks.