MZ-3 or MZ-S?

Hello everybody,
my Z1p is too noisy for my taste and I decided to replace it. I was thinking about these two cameras (obviously I know they are quite different in built and specifications) and I would like to know if anybody here knows which is the less noisy.

MZ-S should have a faster autofocus, shouldn't it?

Merry xmas!
Nico

Hi, I have had an MZ-3 for years and I just picked up a secondhand MZ-S as I wanted to have a high-end Pentax SLR before they get impossible to find. I love my MZ-3, but the MZ-S is clearly the better camera although it is maybe slightly more noisy. The MZ-S autofocuses faster and I love the possibility to switch quickly between AF-C (continuous autofocussing for moving subjects) and AF-S (single)