2024 Gmc Denali 2024 Duramax Diesel

2024 Gmc Denali 2024 Duramax Diesel. Does anyone have any real world data on the 2024 6.6 gas v/s 6.6 diesel fuel economy. Crew cab short bed 4×4;

470 hp @ 2,800 rpm; Looking at a new 2024 at4 and just curious if the 10 speed transmission helps with mpg.