The Louis Garneau Vortice is a serious effort to pack in as many features as possible into a single aero helmet. I don't have a wind tunnel to back up the claims, but it's a good-looking helmet, easy to use, and well-ventilated.
The Specialized S-Works TT is a new version of the McLaren TT helmet they announced in 2012. The S-Works TT is easier to purchase, Snell / CPSC certified allowing it to be used in more competitions, and offers several new features. In our review, we discuss this helmet in depth, and share our opinion of it.