I think the biggest doubt about the vp150 is the rumored varied response over a horizontal plane. One member here, who's opinion I trust, stated he had issues with dialogue at certain spots on his couch but not others. Can you report if there are any drastic changes in response over 5 degree horizontal increments. This test is great! The fact that you are doing is makes it better.
As far as the 2 plots, I can only assume they suggest similar capability and great off axis response. Usually the treble range rolls off the further off axis you get. These seem to be going strong. Can you post on axis response for comparison?
I could guess which is the vp150, but oh the horror if I'm wrong.
