[hexmiles]

Generally speaking if you want to run dos games, dosbox tend to be a better choice for most games, is simpler to use and there is a bigger community around it.

however, Pcem really shine in the amount of hardware supported and better support for windows. Also it seem to be more accurate, but i, personally, never found a game that needed it, but if you have some games that don't work with dosbox it may be worth a shot.