Why is it that every time a database gets mentioned it turns into PostgreSQL vs MySQL ?
I've worked with both, they both have their learning curve, whatever you already know is going to be 'easier' to you because you don't have to unlearn any habits, I wouldn't advice anybody to use either until I know more of the intended application.
Yes, but the other way around (Oracle's implementation of SQL lines up closer to Postgres). Also, Postgres has a procedural language based off Oracle's PL/SQL language called plpgsql, so if you have experience in one, learning the other is pretty simple.
I've worked with both, they both have their learning curve, whatever you already know is going to be 'easier' to you because you don't have to unlearn any habits, I wouldn't advice anybody to use either until I know more of the intended application.