Purely based on feels and emotions, I would say the first! It kept me on edge throughout the movie and my heart was beating for the people. The second one, I wouldn't say it was bad, it was just different. It's like zombies x fast and furious. The thing I liked about it was that it included different elements, other than just zombies like the first one. However, the focus on those elements kind of took away the focus of the main issue. It was still enjoyable though, the new characters are pretty interesting.