As discussed in the thread where those files where posted, such a test should be done without using external gear, plug-ins that emulate analog behaviour, anything that is non-linear, saturation plug-ins, etc. The filter slopes changed and Pro 8.0.0 presented an issue that have been solved in 8.0.20 (another variable that might affect the test) *****
I posted about this topic here:
***** BON-7759 MIXCONSOLE: Fixed an issue where the Slope setting of LC/HC in the MixConsole Pre Rack was not correctly set when loading a project from previous Cubase versions.