The pull ratios are the same all across the board, so you can mix and match to our hearts desire.

The rear zero loss is not that big a deal. I bet some people won't notice unless its pointed out to them...or tries both back to back. The Red just has a bit less shifter play prior to engagement. Once the "click" is made...it shifts the same.

When EP is availble for the 2012 stuff, I'm going to pick up the shifters and front derailleur.