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The intent of this article is to be a primer on the topic of carbon or aluminum. It's subjective and will go into detail on handling, climbing and road feel. This article doesn't go into specific numbers such as drag, exact time saved at your race riding carbon, etc. but can be a start to your discussion on making the switch.
Thanks to Quintana Roo for providing the CD0.1 for this comparison.
In order of importance: my wife and kids, my own health and well-being, being of use to triathletes via this website, playing music (bass guitar mostly).