The sequel isn't loaded with terror. But there are some scenes when I did get a bit terrified. Before, seeing it, I expected to be jumping up and down out of my seat and being really scared. The Ring Two is not a bad movie, I just expected a little more.
The single biggest difference between the two is in video quality. The earlier model outputs a 720p video image while the second-generation doorbell provides 1080p. There's also been some improvements in video processing, because the picture from the newer doorbell is significantly better.