There is no difference. 1p and 2p is the number of stacked cells in parallel. Meaning, you would have 3 cells wired in series (3s) then for a 1p there would only be 1 cell of each of those cells in series. 2p would be three sets of two cells stacked in parallel, then wired in series. But, being they are the same total mah, you won't see any difference depending on the C rating. Hope this makes sense.