As you can see, his work differed stylistically from either of those artists. But that is the case whenever a "school of art" is called out; Impressionists, Post-Modernists, Dada etc. There are usually more differences than similarities between the best artists in any school.
Abstract Expressionists and painters from the 40s and 50s in general were well represented at a number of Art Basel Miami Beach satellite shows. A New York Times obituary says that McNeil was prolific and continued painting right up to the end of his life.