The Rhino box is nice but everything that's essential is on the new double CD, in reality, Aretha's performances from set to set were very close to identical, so the double set contains everything that's really different and avoids the repetition.
As I said, FANTASTIC MUSIC!
I actually don't mind the repetition of the box set, but you're right, this is the distillation and even both original lps were great productions of fantastic music.