what makes 2nd class stamped mail slower to deliver than 1st class?

Question

Are there physically 2 ways to process the same mail in sorting offices, one is just slower? And what makes the 2nd class process actually cheaper?

In: 9

Answer 1

1st class is prioritised.

If you send a package on 2nd class it might chill at the post office for 1-2 working days before the mailing process begins (because they’re sorting out mail that came before yours) but with 1st class (providing you post it before the cut off time) it gets removed from the post office & the mailing process begins that same day.