Both will definitely help in civilian side. I know multiple people in local PDs that are all MPs. Some is same some is different but its the closest to LE.
Be a grunt if you want to have fun. By fun I mean live in crap, eat crap, and walk far. But the upside is you'll get to shoot and drink a lot.
Good luck brother. Just remember you can ask for the MOS but they can/will shove you wherever they want based on asvab...
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