Fearfest by the narrowest of margins
I really liked 'em both, for different reasons, and because they were different styles: City haunt / country haunt. As a patron, if I had the time and money for both, I'd go to both; if I had to choose it would come down to whichever one I was closer to. The comments I heard from the rest of my group were similar, and similarly split as to which they preferred.
I also went to the Darkness both times (pre & post) and I enjoyed that one too, but for different reasons.
All in all I thought it was great to get to do THREE haunts, and that they were all very different styles.
Heck, now that I've typed this I think maybe I'd give the slight edge to Necropolis. I dunno... Hell, I'm just glad I didn't get killed on the bus! Get to the Choppa! (I think he's still passed out)