So, while both phrases refer to the relationship between two things, they have subtle differences in meaning.
Maybe the pictures will help you understand...
Снимок экрана 2023-08-19 в 20.47.02.png
Circled in red are "the same" ... Yellow - "similar" ... But if we combine the results of the selection, and this is precisely the result in the screenshot for the search for "Ameda 1", then we get "similar"