Difference between FO and SIC

I apologize in advance if this is a blatantly obvious, but Google didn’t have any readily available answer. What is the difference between a First Officer and Second in Command pilot?

Good question. They are one and the same. Sort of like potAto and poTAHto.

The first officer gets your coffee and the second in command takes all the blame…

SIC is what the FAA calls you, F/O is your union name.

The difference would be pay and Captains attitude towards said person 8)