Complex sentence: Its prologue, format, illustrations, and text are all very similar to the MS M.383, but there are important differences, not the least of which is the vastly different order of the information.
Split into simpler sentences: Its prologue, format, illustrations, and text are all very similar to the MS M.383. Despite its shared characteristics with the MS M.383, there are important differences, not the least of which is the vastly different order of the information.