AA filter comparison: K-5, K-5 II and K-5 IIs

My original preference (which was based on my experience from moving from an Olympus E3 with heavy AA-filter to an Olympus E5 with very light AA-filter) for an updated K5, was to have one with a very light AA filter, because coming from the Olympus E5, I found the filter of the K5 too strong. There is a certain look that AA-filters give, and you get to know that look. When the completely filterless K5IIs was announced, I had my reservations. Now that I have the K5IIs, these are gone.

Perhaps the K5II has a lighter AA-filter than the K5 after all.

Chris