The difference between these plasmas is that one is a limited distribution (meaning it will only be available in one, or a few retailers), and the other one is a wide distribution piece, meaning it will be available to everyone who wants to sell Samsung televisions.
Neither is 3D. The 3D panels are available on PNxxC7000 and PNxxC8000 models.
Both, however, have the AllShare (Media sharing), Internet@TV and BD-Wise feature, which some of the other models do not have.
Does that help?
Does anyone know the difference between the new 2010 pn50c6500 and the pn50c6400 I read that the 6500 is 3d compatible and also read that the 6400 is 3d compatible and the 6500 isn't, I also read that they both were not so what is the difference. Also are these plasmas the new high end non 3d plasma's. Thanks for any answer