S-PVA panels found in sony and samsung TV's are superior for overall picture quality
where they fall short and this matters most to gamers is input lag, they have at minimum 40 ms input lag. only the 2008 A series Samsung's had low input lag but it was limited to 2 input ports and modes VGA input and HDMI1 relabeled to PC and ONLY when they are getting a 1080p signal on those 2 input modes. picture controls are almost all disabled in this mode and it does not look anywhere near as good as normal modes do as far as color accuracy and pixel level blurring so the panny's are still better than these now no longer made or sold A series samsung TV's
when put into this mode they are inferior to these panasonic's in overall color accuracy and had more pixel lag and some smearing or blurring due to it.
these Panasonic's are as close to a large scale PC monitor as you can get without buying a very expensive 30" IPS PC monitor that will be limited to being used on a PC pretty much only etc.
so in short
better contrast ratio and blacks
poor pixel response speed in comparison to IPS-Pro
poor black uniformity in many cases making the better blacks worse in some cases, larger sized panels tend exhibit this much more than smaller ones but i did have some mild flash lighting in the corners of my 32XBR6
little to no input lag
very fast pixel response
Poor black level and therefore overall contrast ratio
they are pretty much equal in color reproduction and range and the IPS-Pro has an edge with viewing angles but not a real significant edge
just FYI i've owned both panel types and used them with my PC so i know them both pretty intimately