I was looking at the graphs once again and noticed that the first place VT2-600 had a pretty large spike in the last couple hundred RPMs. I also noticed this on some other ESS boosted cars, both E9X and E46 M3s. I don't recall off hand if I've seen it other brands.
Is this characteristic of their tunes or just a dyno anomaly? It's look like it's nearly a 20whp spike which obviously can kind of skew max values a bit.