Transfer & partial deletion of metadata

[ohrenkino]

@DjSurda

James Hype & Kim Petras [vs. Justin Timberlake feat. Clipse]

Try an action of the type "Import tag fields"

Quick Actions and Action Groups

Mp3tag for Mac provides a variety of Actions, which can be used on filenames and tags. The actions can be applied individually via Actions → Quick Actions ⌥⌘ 6 or be grouped into named and reusable Action Groups via Actions → Actions ⌘ 6. Action Groups serve as repeatable workflows in Mp3tag for Mac. When using Quick Actions you can select one of the different available action types from the list. This action will be applied to the selected files and the changes are saved immediately. Tip 1…

Source: %albumartistsort%
Target format string: %contentgroup% [vs. %mixartist%]

This should leave ALBUMARTISTSORT as it is and fill CONTENTGROUP with "James Hype & Kim Petras ", then use " [vs. " as separator and fill MIXARTIST with "Justin Timberlake feat. Clipse" and ignore the ].
As this expression defines a pattern, every space and every case of each letter matter.