Thank you all for answering!
@DarrellM5: treble boosting with an EQ works - but it's not the same like using a real TB sonically. If you ever have the chance to do so, try it out. There is something different about attack and overdrive when using a TB instead of highs-boosting EQ, especially when using the volume knob. And @Digital_Igloo a higher treble setting on the amp is way different than boosting before the amp. Although those kind of automated changes could easily make different presets for different guitars obsolete. Or at least less 'everything for everything'...