Which Wheel Size is Better for Fat Bike 27.5 or 26

Fat Bike Tire Size Test Vol.1: I took two Foes Mutz's, with different wheel sizes, to the local bike park for some downhill comparison fun. Same trail, back-to-back, I tried to just keep it normal/flowy/“coasty“ to see which wheels rolled faster without too much pedal input. The results were interesting.. Foes Mutz(s) 150mm travel fat bike Shocks: DVO Topaz T3 Air Fork: Wren Sports 150mm Fat Tires: Terrene Cake Eater “ and 26x4“ Camera stuff used: Panasonic Lumix G95, Insta 360 One X2, DJI Osmo Action (1)