Neilds
Assistant Pro
But why/how are they different? In tennis the Grand Slams are longer matches, 5 sets instead of 3, snooker, darts etc have longer matches in the top competitions but golf majors are played over the same format as they play every week.It's how golfers are judged, particularly by themselves. It isn't just hackers on a forum using this as a method of measuring, it's what the very best use.
Majors are when the pressure is highest, you are tested the most.