Originally Posted by
lmcq784
It really depends on what you like in terms of geometry. If you like to push yourself in exercise and training, even if you don't race, you might enjoy the more aggressive geometry (like myself). However, if you are more into casual rides, not really pushing your limits, you might like something with more relaxed geometry, like the Cannondale Synapse line of bikes (just as an example).
While that's the general wisdom I think it's mostly a starting point. I have both a race and comfort bike and in all honesty can't tell much difference between them. I can do fast or casual, long or short rides on either. I pushed myself just fine today on my comfort bike.