Zardnaar
Legend
Yeah Greyhawk is indeed more of a Swords and Sorcery setting. While FR is Heroic Fantasy.
The 2e book from the Ashes decided to go father into it and made the setting bleaker even.
I think you are losing cartoon wrong.
Zhentarim are a criminal/mercenary group, so yes they would be quite different to the Racial Supremacist Scarlet Brotherhood.
I would say Greyhawk is more cosmopolitan, it has more actual Kingdoms and Nations then FR. And why should Dragonborn, Drow and Tieflings not be running around?
Greyhawks humanocentric, anything to exotic shouldn't exist or at least be available as PCs.
They've been watering down Drow for example every edition now they're just another race.