Steve Jobs used to constantly claim that Mac’s RISC processors were much faster than Intel, until the day Mac adopted Intel, then without blinking he said they are now much faster and never looked back.
That is salesmanship on a large scale. I thought Steve Jobs was the king of spin (ie convincing people of bullshit) until I saw Donald Trump run for President, and realized that you unlock a whole other level when you do this:
Well the G3 when it shipped it was pretty competitive if not faster, the G4 still was pretty good in some benchmarks but the Intel / AMD post Athlon fight broke loose by then so by the time Apple switched to the Core architecture they were pretty far behind in performance unless you were using 2 or 3 hand picked Photoshop filters all day.