I purchased a 7-year old HHKB Pro 2 Type-S keyboard and a new Realforce R2 PFU Limited Edition TKL.
The HHKB is noticeably more tactile than the Realforce and it is harder to stop halfway. When comparing the sounds, it seems like I hear more of the upstroke sounds of the HHKB than the Realforce.
Multiple people have said that Topre domes stiffen with age, but does that make the Type-S dampers less effective? I do not have multiple Realforce keyboards to compare with. Can someone who has new and old silenced HHKB or Realforce keyboards or dome swapped keyboards chime in?