Difficult really. Both very different despite being apart of the soul genre.
I suppose I will go for Dusty. I only really like Aretha's obvious well known songs, where as Dusty, I love her best known songs, a few of her albums and many songs that never made her albums. She also has a beautiful tone and emotion to her voice that moves me to tears. I can't say I have ever felt emotionally connected to Aretha, compared to Dusty.