Of course all dynos are different and how they are loaded is often reflected in the differences in plots. This is also a 2.0, and results will reflect the 20% less displacement vs the 2.5 that is obviously a bigger 'pump'.
Transient response is something you don't see on a dyno plot, but you certainly feel on the street and means everything when you talk about real world drivability. Unabomber is a 'say it how it is' kind of guy and been heavily involved with Subies for along time. I don't doubt the results, although I think they are mostly due to the super awesome header
Good job Unabomber, I bet it's a blast to drive.