Be careful, Anon.
PMI's PMBOK Guide is not a methodology nor a comlete list of "recommended practices." It is merely one organization's view of the various processes associated with project management and a buffet table of tools and techniques that might address those processes. As such, it is up to the reader to assemble their own PM meal, which may or may not taste that good, depending on the insight and intuition of the chef.
I'm not too familiar with Prince2, but my limited awareness of it strikes me as similar to Critical Chain-based project management as an approach to most of those processes that is put together in a coherent and consistent manner.
Sort of a gourmet meal by a 5-star chef rather than a hapazard pile of food pulled off of a smorgasboard.