The difference between slow walking and fast walking is the ability to drink from an open cup.

The difference between thinking and not thinking is considering more than one possibility / perspective or going off on more than one tangent.

The difference between being tall and short is if commonly you can look over people, or if you are overlooked. Therefore hiring managers are very tall, and shy people are short.

The difference between fun people and unfun people is the initial reaction when someone sees that you have arrived to the event.

The difference between justice and injustice is justice. Not much to that one.

The difference between nerdy and unnerdy is how much your mom would be completely lost in your conversation.