What's the difference between packaging and printing? Which job is better? Which is better for postgraduate entrance examination? Whoever has the highest salary will do what he packs.

I am a student majoring in printing. Mainly that printing and packaging are not separated, and the employment direction is basically the same. But I think printing is better than packaging, and there are no graduate students majoring in printing. If it is not relevant, the printing material specialty of polymer is one. If you take the postgraduate entrance examination, if you take the examination of our school, you are recommended to take the examination of communication and rank it in the country.