Identity of meaning means the later discourse substantially retains the same distinctive assertion. Resemblance of meaning involves a shared feature even though the relations and applications differ.
Illustration: “A generous man benefits others like rain” and “a devoted teacher illuminates others like a lamp” both convey benefit, but their subjects, images and contexts differ.
The shared notion of benefit is insufficient to prove borrowing. The analysis needs a more specific conceptual match and, where claimed, reliable evidence of precedence.