No time to respond to everything but that's a pointless comparison. You're comparing well-used (like you said, three and a half years) and lubed switches to completely new ones. You're even comparing a 3.5 year old case with a brand new one. Especially with Topre being the design it is, it's obviously going to get more springy with use, and any plastic used in casing will slightly change in color over time.
First, the majority of my post is a comparison of the two brand-new Hybrid and Hybrid Type-S. Second, the few comparisons I do make between my old Pro 2 and the new Hybrids are meaningful for those coming from their old Pro 2, which I imagine will be many. If you're new to Topre, then they're irrelevant, but if you're coming from an old Pro 2, the differences can be startling or misleading as it was for me. Third, I didn't say they were lubed, only the stabilizers. The new Hybrids' stabilizers also come lubed from the factory. Finally, the comparison of the old and new cases is notable because HHKB white cases usually get darker over time, but the new cases seem to me to be darker/richer from the beginning. You seem to imply that the old case is lighter because it's older.
Besides the fact that the Type-S is silenced, you're getting the exact same switches as any other Topre board. HHKB doesn't make their switches, nor do they get Topre to modify them, so any difference you feel is due to wear.
Are you sure about that? I thought that the sliders on the Type-S were longer to accommodate the O ring. Regarding my comment about tight tolerances, it's just a feeling, as I said in my post, and I'm wondering if they really are tighter. Regardless, the feeling of tighter tolerances exists, due to whatever reason, at least for me.
You keep referring to the switch but in this case you probably mean plunger..but those are different as well (at least they are for HHKB and type S) as in they're slightly different to allow for the ring. Now, maybe the new hybrid uses the same plunger which may account for the tighter feel for the Type S and a bit of a looser feel for the regular...I guess when someone breaks them down we will see (I haven't looked that up to see).
You're probably right about the plunger. I guess when I use the word switch, I'm referring to any part or all of the switch assembly (slider, O ring, housing, dome, spring).