Diamond league may be more likely to see records broken, frankly, because it allows pace setters and the light indicators on the infield rail telling the runner

Diamond league may be more likely to see records broken, frankly, because it allows pace setters and the light indicators on the infield rail telling the runners exactly where the world record pace is at. But most athletes don't compete in every meet, so the field isn't usually as competitive, and nobody plans a four-year training peak around a diamond league meet, so maybe that makes up for it.