besides the glaring fact that they're both 1st party characters and their respective games came out the same year
they both wear scarves....that's the rivalry right there (if they are rivals)
They'll just be arguing over who has the cooler looking scarf ( retro & western or chic & city slick) and since there's no one to provide a 2nd opinion it'll turn violent
and while we're adding scarf wearers, they might as well add the journey guy as well
From what I can see, after playing both games, they both protect innocent people.