From the knowledge base:
“The channel EQ in Nuendo 6 and Cubase 7 has been newly developed and is technically not the same EQ as in previous versions anymore. We have taken care to make sure that EQ settings saved in projects of previous versions are correctly translated to the new EQ to retain the same perceived sound as best as possible. However, when loading projects saved in a previous version into Nuendo 6 / Cubase 7 you may notice minor variances of the Q-Factor value for all EQ bands, especially evident when using the “Parametric I” filter. In this case the sound of the playback, dependent of the audio material on which such EQ band filters are applied, can be more or less noticeably different and may require re-adjusting the Q-Factor on affected channels.”