I think the takeaway from iab's comparison is that the medium size top of the line Cinelli "Pro Best Of" carbon fiber frame with carbon fork is only 330g (0.73 pounds) lighter than the medium size Cinelli XCr stainless steel frame with carbon fork, and the medium size Cinelli "Pro Estrada" carbon fiber frame with carbon fork (Cinelli's lightest frame) is only 530 g (1.17 pounds) lighter than the medium size XCr frame with carbon fork.