We have just a few rides on our
28 mm Schwalbe One's, but both captain and stoker agree that they have a nice feel. I don't know if we could pass a blind test to differentiate between the Schwalbe One and Ultremo. They do provide a robust, confident feeling.
The whole
point of Schwalbes is their availability in 28 mm, whereas the Continental GP4000s is not (yet). Choosing Schwalbe One's but selecting 23 mm is like going back in time to purchase a MKIII AC Cobra, but telling Shelby that instead of the 427 cubic inch FE V8, you'd like a 170 cu in straight six.
