The original was way ahead of it's time. I remember thinking how impossible the storyline was, but now, when you think about cloning, DNA manipulation and genetic engineering, it's not so far fetched after-all.
Both are good, but for it's time, I love the original. That must have freaked people out back then. The scene with the half fly, half man in the web at the end is great. And the wife has to kill him with the press...just a great movie. Love it.