Difference between Panasonic DMP-BD605-K and DMP-BD605P-K?

I'm not sure there is a difference but the way I am understanding it is...that the BD605p was a Cosco exclusive model, the P probably stands for "Program model"....Also it seems that the BD605 without the P is a higher end model as the Cosco model corresponds to the BD60 as far as I can tell....I believe the 605 actually weighs more and also does "Viera Link HDAVI control 4" what ever that is and the P model does not do that...otherwise I could not find any difference and not sure there is a difference because its assumed that the p model is a BD60 but there is no verification of this its just speculation ....I would take a look at the weight if the weight is the same then they are the same model if not the one that weighs more may be more desirable at the same price anyway.......