(Click to Enlarge.)
This should be the first K-5IIs sample that posted online, via a forum post at Photo Malaysia here.
In the same thread, we can see a pair of comparison pictures on the K-5II and K-5IIs sensors and their different appearances:-
Via this post here, in the same discussion thread.
Well, I like the appearance of the K-5II sensor better, it looks clearer and more transparent after all.
Btw, if you wish to see the official comparison illustrations by the PR about the difference between the K-5 and K-5IIs, read the opening post of the above thread here. The diagrams were displayed at Photokina as exhibits.