I assume that what they mean by "Advanced-Grade Composite, Alloy OverDrive Steerer" is a carbon fork with an aluminum steerer. Aluminum frames with carbon forks are pretty common for entry level road bikes from major manufacturers.
So I'm a little surprised that Jamis has an aluminum fork on their bike and that probably explains the price difference. I can't imagine a straight bladed aluminum fork giving a very pleasant ride but that sort of thing is often a matter of personal preference.
You could always get a carbon fork from Nashbar for less than the difference in price between the bikes. It would be a charcoal or black color most likely and not match the frame but wouldn't clash either.
Last edited by tjspiel; 07-09-11 at 08:14 PM.