Yearrick looks to have a vertical gauge scar, while the body on the roof has a horizontal scar (or more likely simply blood splatter like is found elsewhere on his face/neck). Yearrick also has way more wrinkles than the shooter. Faking the body would be a huge undertaking/risk.
IMO the body is definitely Crooks.
Hard to tell about the direction of the gauge scar in the photo of the living Yearick. We would need a better photo of his right ear. I have this low resolution one, but it appears to show the ear when it still had a gauge or plug in it.
I can’t find a better one apart from the uncropped splash image here:
And I don’t know how to capture and search for this uncropped image.
I’m not sure what you mean by “more wrinkles.”
If the assassination of Trump had been successful, I don’t think the plotters would have faked the identity of the assassin; they would have identified him as Yearick, i.e., as Antifa, and allowed the social carnage to follow. When it failed, however, they panicked. Yearick’s name was already circulating on July 13th, but overnight they evidently decided not to play their Antifa card but instead to try to pin it on Crooks, who was already present at the rally as a decoy.
Of course this was very risky, but the stakes are very high, and that is precisely why the body was cremated as quickly as possible.
You are of course entitled to your opinion, but here is an interesting experiment for you. In the following photo, all the blood has been digitally removed from the shooter. Take these three faces and show them to someone naive - i.e., someone who has not been closely following the events around the Butler rally - and ask them whether the person in the center most closely resembles the person on the left or on the right. (Tell them to ignore the glasses and the beard.)
Please actually do this and let us know what they say.