Long time, hard-core Shimano fan. Tried 2013 SRAM Red for the 1st time 5 weeks ago. Impressed enough to get more SRAM for another bike, this time Rival. Great stuff. When Dura-Ace 9070 is readily available I'll probably back in the Shimano camp, but I digress.
A Red level bike and an Ultegra level bike likely are on different quality levels, meaning the Red bike probably has higher grade carbon, wheels, finishing components. Most likely the Red level bike is lighter, too. Perhaps significantly lighter.
Again, 9 times out of 10, you will be changing stems for a different length to get a proper fit. BTW - MAKE SURE YOU GET A PROPER FIT!!!
Finally, the VeloNews Sept. 2011 issue had a comparison test featuring, among other bikes, a full Red, Focus Izalco. The Focus was the winner. Granted, these things need to be taken with a grain of salt, but this comparison test was very comprehensive, and, I thought, impressive.
If the Focus' geometry fits you properly (VERY IMPORTANT!!!) I would go with that bike without question.
Found that comparison test:http://velonews.competitor.com/2012/07/ ... our_229143
" onclick="window.open(this.href);return false;