Slightly prefer to the original - I don't have any problems with the OG's level design, but I never quite appreciated it as much as many people seem to. The more wacky, sometimes gimmicky levels of Doom II, while obviously less tight (and occasionally just... not good), always had me at least excited to see what would come up next. Many new enemies seem redundant on paper, but the sheer added variety (and chads like archvile) are worth it to me. Doom was satisfying but I can't honestly say I'd play it for mechanics alone. This is the sort of game where novelty is worth it, and it's often enough done well - or at least inoffensively, with some obvious exceptions