Most big clubs I know have two football teams in there city.
Hence
Liverpool, Everton
Barcelona, Espanyol
Real Madrid, Altletico Madrid
Inter Milan, AC Milan
Man City, Man Utd
Arsenal, Chelsea
and so on
Newcastle and Sunderland have one team in their citys so logic tells me they are like Brighton for fuck sake. After all what the fuck have Sunderland, Brighton and Newcastle won?
After all you need rivals from the same city history tells us