I don't really know the difference (if there even is one) in the protein bioavailability among the different ways of cooked eggs, but I do know that cooked (gbrice75 is confident that pasteurized egg whites fall in this category) eggs have a protein bioavailability of 90.9% versus raw eggs which have a protein bioavailability of 51.3% (Digestibility of Cooked and Raw Egg Protein in Humans as Assessed by Stable Isotope Techniques); therefore you should always cook your eggs, which has the added benefit of eliminating Salmonella risk too.