I bet the MP's would do even better with proper spacing. Interesting note on the pressure of the Toro... I see the spacing is different too.
I would like to see a 30 PSI vs 40 PSI comparison between the Toro and the MP.... both having proper spacing.
I have spread sheet "somewhere" and the increased DU saves a ton of water.
I still believe the MP's are more tolerant over a wider range of pressure. Nonetheless I like the at head pressure regulation.