Have you tried them? What you prefer?
Even if you haven't, what would you suggest?
I've never tried a Type-S HHKB, but I did Hypersphere and lube my HHKB, and it makes a huge difference—the lube perhaps more than the Hyperspheres, both in terms of feel and sound (to me, the lube increases resistance when pressing keys in a good way and enhances the nice Topre thock sound).
The one thing I have noticed about Hyperspheres on large modifier keys (shift, enter, and delete, primarily) is that they create a very faint buzzing/vibrating sound when these keys are released. It's so faint, that you almost have to hold your ear near the key when you press it, but if it's very quiet in the room I can hear it as I type normally. Just a hypothesis, but I feel like it may have something to do with the size of these keys creating a kind of echo chamber that amplifies the sound of the ring hitting the bottom of the plate on the upstroke (it's only on the upstroke—when releasing the key—that I can hear the noise). I'm curious if Type-S rings have this same kind of buzzing/vibrating sound.