If I can find some time I hope to create and example of how to do this for a single field. 2 way relationships is something that is requested a lot and it’s actually easy enough to do for a single field.
As far as your question, yes. You could define different fields with different labels. The only thing that matters as far as that plugin is concerned is that the field names are the same and that they are either a relationship or a post object field.
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