For my understanding the difference between the to is that in physical , mining needs hardware while staking tou need a wallet that will sync with the server, if you see there is also some simillarity, but different result, in mining you gain part of the token for lending your machine without any token unlike staking that youll need a certain amount just ro stake, at the same time its a risky investment since in my experience every staking coin vanish
Simple explanation like this can bring good hints to anyone who's seeking for much easy to understand information. Both have their own risk as you don't know the next value of the coin you are working with, But if you have plenty of time to review everything then it's easy for you to analyze and to choose which particular place to invest your money.