IMHO is the combination Andantes and The Marvelettes, because in this combination I can selected the voices, who sings what. Surley I am not an expert and I havenīt the right ears to hear the differences. But Martha Reeves was since 1964 more a solo artist then a lead singer of group, better the lead singer of the andantes/vandellas combination. And the DRATS time was more Diana & The Andantes then the Supremes. The voices selection with The Supremes / DRATS + Andantes and Martha Reeves and The Vandellas + Andantes are for me personelly more difficult. Could this be true that the voices more mixed ?