your better off taking a HD movie file (about 30-90 seconds long) on a USB stick into john lewis or a panasonic store, plugging it into a set and watching it, then doing the same on another set, or take in multiple usb sticks and compare directly, the pictures in this thread are going to show you nothing.
the quality of camera's will vary, the quality of the footage will vary, the quality of the image file will vary, the tv settings will vary (calibrated and non calibrated), etc, etc.
seriously i could show you 3 pictures of the same footage on 3 different tv's, but i take them using different camera's, in different lighting and use different image files and make the worst tv out of the lot look a lot better than the best tv out of the lot, yet it proves nothing.
if you want to know the cosmetic differences then Panasonic's own website can easily show you them