I’ve seen both! I recommend them both for different reasons. Most people seem to have only seen the newer one, which is great because of it’s budget allowing for better effects and setpieces. The original, on the other hand, has a very low budget (even for it’s time) which totally works in its favor because it feels much more real. They’re of different eras and but still carry the same underlying message. I wish I could be better about saying which one was definitively better. Probably the new one, but don’t take that as a reason to avoid the original, it’s a time capsule of early contemporary horror from 50 years ago