I don't own the one from Dan and Dave's site, but I just got the palming fundamental from England 2 days ago from winning last weeks SNC. You learn three fantastic palms, that are extremely well taught. All the palms are workers in my opinion.
I don't own Jason England's palming fundamentals or John Carney, but if I were you, I would choose England.
I would suggest Carney for no other reason than that he teaches Vernon's Topping the deck, which is an absolutely amazing sleight.
C