I'll say it also depends on the fabrication method. I have an Allez Sprint from a few years ago - it's aluminum alloy with carbon forks+seat, but the joints ar

I'll say it also depends on the fabrication method. I have an Allez Sprint from a few years ago - it's aluminum alloy with carbon forks+seat, but the joints are welded a few inches away from the joints instead of right at the joint. The result is a stronger bike and an extremely responsive ride that I enjoy for rides <50m miles. You'll feel everything in the pavement, which is both a good and bad thing depending on your preferences. For longer rides it's hard to beat my old-school fully lugged steel frame on flat routes, but the added weight usually isn't worth the tradeoff for me.