Thank you @Thomas_Lerman for taking the time to do that!!! 
This points out the exact thing I was trying to get at. RainMachine has all the same general specs that Rachio does. Problem is, if you chose “spray heads” in each controller, we have don’t know if they use the same default values. Pop up spray heads can vary WILDLY between manufacturers and series. One spray head might put down 1.25"/hr, while a non HE-VAN nozzle can put down over 3"/hr! That is where the advanced settings in Rachio come into play. Being able to dial in the nozzle inches per hour for YOUR YARD is a fantastic feature, and is very important that the setting be accurate for Flex Daily to work.