in the ventura race i don't like the idea of a combination of materials in the frame, it is an aluminium frame with carbon monostays (in the rear triangle), the trek has a stiffer bottom bracket area for better responsiveness of the bike, the head tube is higher and that gives you a better position on the bike, im not sure how it works but the speed sensor is integratred into the frame (speedtrap) so you don't need to mess around with more wires and stuff, the bianchi is a more traditional bike for modern standards of course,