It's safe to assume that you're comparing times from Car and Driver's lightning laps done in different days in different conditions with different drivers. Watch the in car shots, they're a joke. Same day, same driver the ats-v was .01 faster at Chuckwalla.Manual to manual, the Shelby is actually 4-5 seconds faster at Laguna, and 7-8 seconds faster at VIR,
also, the Shelby has exhaust valves and a quiet mode. I despise it, and flick the loud switch right after startup!
Let's be honest here. Nobody buys these cars and competes where a second here and a tenth there matters. If all you're doing is HPDE events you aren't either.