Originally posted by krebsy75 Hard to compare these cams. One has a mirror, the other one doesn't.
I'm not sure why this should make them hard to compare. It might be a reason to think the K5 should be louder, but to say the K5 is louder would be to make the comparison (and also that doesn't seem to be other people's conclusion anyway).
More generally, if I asked which camera was better, it seems that we could say that two cameras are so different that they can't really be compared. But volume seems to be one way in which cameras are commensurable. (Although there may also be issues of the qualities of the sound, as well as just the volume.)