The term “metaphysical” as used here is referencing a reality of being. Both God and Man exist as beings and there are metaphysical differences in their natures. Therefore there are differences in the reality of the existence of both beings beyond the five senses of the human body. This is what metaphysics is about – a study of the nature of things. For a more in-depth discussion on this subject, I recommend the book, Made in the Image of God: Understanding the Nature of God and Mankind in a Changing World by Reid A. Ashbaucher.