Calibration BD, movie specific?

[SonOfArathorn]

Simple question....

Are the calibration tools that come with certain BDs, i.e. All Pixar releases, Nature's Most Amazing Events, are they specific to that BD? I ask because some of them are different. On the BBC NMAE BD there is a very advanced calibration tool that seems to do a great job of dialing in my settings and making it look positively stunning, but on the Pixar BDs the same settings don't always jive. There's no a massive amount of difference, but it's there.

Also, are any of these as good as just getting the HD calibration disc?