So do they feel more flat to you?
My concern is very particular: I just want to know whether, even though they're spherical, the more flat surface allows to slide fingers between keycaps more easily (when compared to cylindrical). If so, I'd assume that that characteristic stands regardless of the direction (because of the circular symmetry), whilst with cylindrical it's much more easy to slide up/down direction than to left/right direction. And that'd be a very nice characteristic to me (unfortunately, I guess Round 5 won't have SA in more slippery material like PBT or POM).