Was it harder going from 1-2 kids or 2-3 kids?

Me and my SO are contemplating trying for a 3rd one. Trying for the first one was such an easy decision for us we knew right away we wanted to start trying and same with the our second we knew right away we wanted to have a second kid and we we felt really confident in our decision to have 2 kids. Now our oldest is 4 and our youngest is 1 and a half. But we’re going back and forth on if we should have. 3rd one and start trying next year some times we feel like we should and sometimes we feel like we should just stop at 2 and not have another one. How did you guys know it was the right decision to have a 3rd baby?