My impression is the two terms are not exactly the same, with some vague differences in connotations, but a great deal of overlap, and often used interchangeabl

My impression is the two terms are not exactly the same, with some vague differences in connotations, but a great deal of overlap, and often used interchangeably. By the way, this is general problem in philosophy, as compared with other fields. Many standard terms are inexact in their meanings, and used differently by different philosophers. So for instance, some philosophers use the term ontology to mean the same thing as metaphysics, and others make a strong distinction between the two. Heidegger even switched his meanings between his early and later career. Indeed, there isn't even a standard definition for the term philosophy itself.