IMO there are significant differences b/w the two last other than the toe.As earlier mentioned Budapester is a shorter narrower last as well as a more tight fitting heel. The ball area of the foot is also significantly snug than same size 3636 lasted shoe. So in essence if you have a wider foot going 1/2 size up will be a intelligent move. P2 should not be compared to either of the above but more to the F last. The vamp and toe are much narrower with a lower instep than the F.