I've ridden Ultremo Rs (23) Ultremo R.1s (23 & 25), GP4000 (non S, 23), Rubino Pros (23), Conti 4-Seasons (28), Zaffiro Pros (23), and Fusion 2 Ultras (23)
The fastest tires are definitely the Ultremos. The GP4000s are not as fast but have a softer ride. The 4-Seasons are pretty nice but noticeably slower due to the size. Zaffiro were not horrible, but pretty tough. The Rubinos and Fusions just alright.
But besides all that, using latex tubes really made an extremely huge difference. Cost of using them on the street doesn't make sense but I put them on the track bike and paired with the Ultremos it feels amazing.