On the second one? I think it sounds like any Coyote.I can tell even with idle how different it is from the normal coyote, There isn't any rumble at idle and I can def hear the flat plane crank pulses coming out the rear
That's what I'm thinking they probably have a different driver mode selected for each video, or another possibility is the car idling in the teaser Is the GT350R hence the more aggressive idleThe valves in the exhaust can be adjusted from mild sound to wild from what I have read. Could just be different settings selected for each video.