The Conjuring 2 owes a lot to its predecessor. Both Conjuring movies have nearly identical frameworks. This time, though, all of the events are presented on a much larger scale, and the film overall is way more ambitious. There’s a lot crammed into 134 minutes; not everything works. But is it scary? Hell yes it is.
Source: io9 – The Conjuring 2 Raises the Stakes in All the Best, Scariest Ways