I have an Independent Fabrication Crown Jewel ti and a Serotta Legend Ti. I don't know if that counts in your league of super bikes.
The thing I find most tantalizing about titanium is ride quality. When I was living in California and dealing with poor road quality - especially exposed aggregate - the Crown Jewel just seemed to gloss over the bumps. On better roads, smooth as glass.
I also have a couple steel bikes for reference (both IF Crown Jewels).
If I take out one of my steel bikes for a ride, it's as if the steel bike produces a "rumble" on exposed aggregate.
On my IF ti, that rumble gets shifted up into a different (higher?) frequency that's less harsh and less noticeable. More of a buzz than a rumble.
Hope that helps!