Miles kicked ass throughout his entire career, I think we all know that Coltrane didn't/couldn't keep up with him. Should be an easy answer.
Right on. Scethces of Spain is great. My favorite is Kind of Blues. I learned to play "So What" on my piano.
I prefer Miles, covered a wide variety of sounds within jazz...plus the melancholy sound of his trumpet is nearly supernatural..... Nothing at all wrong with Coltrane though.