I'm not certain of the proper names for the various keys. I know I had a Roland G800 and the keys were too heavy and slow for my taste. Maybe they are why the beast weighed so much

I like the Tyros keys. Yes, I know they are "smaller", but I didn't notice much difference when I had Ketron or Korg. Now that I've played the Tyros, I no longer care for the PSR 2/3K keys.
DonM