These seem to be variations of order flip-mats, but man are they busy/useful!I especially like the little walkways and bridges in the forest, but the fog in the city streets is a very nice touch and useful for concealment...
I agree with you and like the finer attention to detail on these that you noticed and called attention to. However I have to say that like you I notice the similarity of previous flip mats I have and at first I thought that the images were simply placeholder images copied from previous flip mats.
These map sample images do looks nicer than similar previous ones that I already own, and may be indication of an improvement in artwork on what was already a pretty amazing product line to this point. Just for that reason alone I am tempted to get these, however the similarity to what I already own may push me to giving these a miss, and spending the money on different Paizo products instead.