I posted this at another website, and had no response except that someone thought TI would be more durable…any other thoughts regarding my question below: I am currently riding an aluminum Cannondale Tri Bike. I have test riden a Seven (TI), and an Isaac (Carbon). I loved the rides of both the TI and the Carbon. Both bikes fit me very well. Both will cost me about the same amount of $. Besides a couple of pounds of weight, is there anything else I should consider? I weigh around 150lbs. if that matters
At 150 lbs, you can get the lighter bike.
get what you think cooler or you will always look at the other bike. (and btw it is Ti not TI).
Good luck, it sounds like you can’t go wrong with either bike.