Patti Abbott sure does ask interesting questions. Today she wonders about the sometimes vitriolic comparisons between the two writers. This is the response I wrote. And please remember I'm rarely wrong more than 98.9% of the time.
I think Ross Macdonald was the finest writer ever of private eye fiction. He brought literary integrity and psychological depth to the form that has never been equaled. I think John D. was the great populist storyteller. He once said that he wrote folk tales for men who carried their lunches in buckets. While I don't think he had the depth of Ross Mc I think he had a range and storytelling ability that Ross Mc sometimes lacked. Hell I read them both all the time. Hard to beat either one of them if you like to watch masters at work.