I occasionally experience the same phenomenon with my ZT 0801, also - mostly when performing a high-torquing cut (zip tie, line, etc.).
I am quite happy to be able to weigh in on this comparison, now, for I just got my Spyderco Domino in the mail yesterday! I have wanted one for the aesthetics (and every Spyderco quality) since I got my ZT 0801. I will concur with some of the earlier posts - the 0801 is absolutely glassy smooth any way one flips it. It's to the point with mine that I have a hard time performing an incomplete flip. The Domino, on the other hand, is also extremely smooth, but can be incompletely flipped if done incorrectly. The stronger detent on the 0801 seems to prevent one from an incorrect flip, whereas the Domino works best with a light switch form of flip. As far as the actual feeling of smoothness, and this is complete speculation, it almost feels as if the bearing washers in the 0801 are free to rotate around as the blade rotates, and the bearing washers in the Domino seem to stay in place as the blade rotates open, if that description makes much sense, that is. Ultimately, I absolutely love both knives for what they each are.