Michael Jackson would know - I mean no pun intended of course. First things first: neither have I seen the Mario Bava movie (60s I believe) nor have I read the source material. So no idea how this fares to either of those. I did watch the direct sequel though (part 2, part 3 was not out at the time of writing in Germany).
Even without seeing that there is a Bava movie, I would have said this feels like a throwback. In many senses - the main female character may be a bit more "modern", but almost everything in the movie has a 60s vibe to it. And I am not just talking about the time/era this plays in ... we do get to see a partial nude behind ... not sure that was something that movies did back in the 60s ... but let's not get hung up on ... well "butts". Again no pun intended as always.
The main character (see title) is quite the interesting anti hero. He is anything but a good guy ... and yet we may find ourselves rooting for him. There is a big twist that does not make much sense - (non existing) dialog wise, but if you suspend your disbelief you will have fun with the movie ... and its roller coaster ride!