SH4 is scarier by far. RE4 technically had better gameplay. I say technically because although the gameplay was good, there were some small issues I had with it that made it unessesarily troublesome, and it got repetitve pretty fast. By about half way through, I could barely stand playing the game anymore. It was just twice as long as it should have been given the story was uninteresting, and all it really had was gameplay. I'll give it to SH4 for that reason. The gameplay may not have been as good, but at least it kept me interested.