If a service chooses to name a rank “sergeant” then it should be the same as other sergeants in the Marines and the army.
It was always irritating to have Air Force NCOs one pay grade lower than my NCOs, yet carry the same rank title as men with years more experience..
That’s not an answer to the question asked, but I’m not emotionally invested in either the answer nor discrepancies between DoD departments.
My original post was just pointing out how it was different from my time in the USAF, that’s all.