Originally Posted by W Cole

From my research the groups are pretty similar except everyone agrees the Shimano FD shifts much better. The SRAM Red FD is reportedly very "flexy" and many opt for using a force FD instead. Also the SRAM Red chain is not very good so many opt to use another brand and the casette is "loud" so many replace it with something else as well.

Armed with this information, IMO the only reason I would go with SRAM Red is because I like the shifting style/ergos/tactile feel of it THAT much better than Dura ace. I still have to go on an extensive test ride of SRAM Red and see if I like it.