There is a time gap between Wiegman filming the Island and Hughes filming of the "getaway" car. This means the light source/Sun has moved and therefore changed the shadows being cast.
Dear Royell,
Yes, the sun has moved a significant degree.
That's why the shadows on the car that's visible next to the "island" (or do you still think it's a car on the other side of Elm Street Extension or maybe the wall of the TSBD???) in the gap between "Purse Lady" and "Fedora Man" in the Wiegman clip are
different from those cast on the 1958 Pontiac Bonneville parked in the same spot in Hughes, but retain enough gross similarities as to make it possible to determine that they're being cast by the same branches and clumps of leaves and are, therefore, being cast onto the same car -- your 1958 Pontiac Bonneville "Getaway Car"!
Look at it this way:
Given the fact that the sun has moved so much, if the shadows had been more similar than they are, it would have cast (pardon the pun) doubt that the cars were the same.
-- Tom