The difference is exclusivity or deservedness (with jealousy being a superset of envy). A combination of exclusivity and deservedness could be jealousy regardi

The difference is exclusivity or deservedness (with jealousy being a superset of envy). A combination of exclusivity and deservedness could be jealousy regarding a "cheating" partner in a monogamous relationship. To describe that as merely envy would be confusing, at best.