Why isn't New York Red Bulls and Philadelphia Union a big rivalry?

Philadelphia Union vs New York Red Bulls quick reference – The Philly Soccer Page

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As newer MLS rivalries get pushed to the forefront, is the Atlantic Cup dead? - The Athletic

Red Bulls' 2023 Schedule Unveiled - New York Sports Nation

Why isn't New York Red Bulls and Philadelphia Union a big rivalry?

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As the popularity of the Philadelphia Union grows, so too does that of its mascot, Phang – The Morning Call

Philadelphia Union 2022 schedule has 5 MLS national TV games including NYCFC, Portland Timbers

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Match Preview: Philadelphia Union vs. New York Red Bulls - Brotherly Game

ASN article: Bale to LAFC in non-DP blockbuster, Atlanta woes, wild Philly-NYCFC game, and more

Top 10 individual performances in Union history - Brotherly Game

FUCK UNION - New York Red Bulls Fan Shirt - Text Ver - Beef Shirts

NYRB vs Philadelphia Union: TV channel, streaming, team news