Bill's car not only has a carb, it also has an engine swap. The engine he's using is quite different from the PRVs that were intended to go in cars, so it may have a different power output than stock.
It also doesn't have K-Jet bungs, as it was designed to run on natural gas, I believe.
Also, "which delorean is faster" is a video he posted, where one delorean is filming while another delorean is in front, and one of them accelerates. That's his definition of "faster".
He's not here to defend himself though, so I'll just state those facts.
--buddy