Hi. Because you can't figure it out does not mean that others of us can't. With all due respect, there are big differences between carbon (to use an example) in a Trek Madone 4 and Trek Madone 6. Both are carbon. That's about where it ends. It's also about the manufacturing process. HIgher end carbon frames have a much longer and more exacting manufacturing process than a poured/injected style carbon mono frame.

You, again with all due respect, are the perfect BD customer. Buys it because it's "Carbon had Ultegra and is relatively inexpensive". All the explanations I could give you about the frames and why some are more expensive than others would be wasted time for both of us.

Fortunately there are plenty of buyers and plenty of sellers and you get to choose. At least it's still that way here for a little while. But you can't compare what you have to what others have because you really don't know.