I spoke with some Factor reps a few weeks ago, and they spilled some of the beans on the new Slick.
They said it’s not faster than the Hanzo - the Hanzo should still be faster and lighter, but it’s also a pure TT bike - none of their testing involved strapping crap to the Hanzo. The Slick is designed to have all the normal tri stuff there, and be a lot easier to work on. But if you can run a Hanzo with a BTA and that meets your needs, it’s the faster option.
They did not specify by how much, of course.
I’m a pretty experienced mechanic, but building up my Hanzo was one of the most insanely complicated builds I’ve ever done (and I owned a first gen Giant Trinity). The Slick looks a lot more liveable.