Not a big fan of Motown, with the exception of Marvin Gaye. Diana Ross? The black Celine Dionne with an ego to match..the "rest" of the Supremes, brilliant harmonies and arrangements
I Kinda like the Atlantic Records/Stax-Volt sound of R&B. Otis Redding, Sam and Dave, Stax-Volt Band, Etta James, Eddie Floyd etc etc etc . Maybe it just had a bit more of an edge to it. They didn't need the "strings" and all the flowery arrangements.
Just my opinion