I fly this type quite a lot and find the rear of the cabin much quieter. It was the same on the earlier series aircraft as well and would think its pretty standard on all props especially high wing models.
Compared to the old ATP they are much quieter wherever you sit though.
I used to do the shuttle run down to LGW every week some years ago and discovered that although noisy the back seats of the old 737s did have one big advantage, you always got your breakfast first.