Originally Posted by
IntelXE
I was actually leaning towards the R3 because I wanted to try a different brand. Cervelo's website tells me nothing about the differences between their R3 and R5 or why their bikes are different from the competition.
While you were on their web site, did you notice their forum? There is where you can get more of the questions that you are asking. To make an assumption that "Cervelo's website tells me nothing about...."
Furthermore, their "ask the engineers" is another source of knowing the Cervelo bikes.