Both.
It’s just an evolved adaptation on the Air Raid, Sonny is an old school Leach disciple from back in the early Kentucky days, so he’s seen it from the architectural stages when it was brought from Hal Mumme from Valdosta St to D1 football.
But the the system that Lincoln Riley, Kiffin Kingsbury, Josh Heupel, Kendal Briles, Jeff Lebby, Zach Kittley, Garrett Riley etc is not the same as the old school Air Raid that Leach still runs, they combined it with the uptempo spread run game & created more balance to not allow Defenses to just pin their ears back & attack the OL.
Garrett is the next amongst the young crop of offensive gurus out there, he learned under his brother at ECU & David Beaty at Kansas, plus had a year at App St with Eli Drinkwitz before going to SMU. He’s not the main play caller for SMU, but he’s getting Master class tutelage under Dykes & will more than likely get hired as an OC for a P5 school in the coming years.