You cannot do this with multiple files but with a single file and your selection of tag-fields within the extended tag-field menue, which is not so comfortable but may be a little help in certain situations.
Mark a file -> Press ALT-t -> Select some tags ->Copy to the clipboard ->Leave the extended view -> Mark another file -> Press ALT-t -> Paste from the clipboard.
But:
Tag-fields get doubled if they were selected in the source file and already exist in the target-file.
They won't get replaced by the source-tags. So you have to delete these tag-fields in the target first within the extended tag-view.