The Austin looks like whoever created the master didn't get near an actual car, but worked from photos. It measures about right but a lot of subtle body details are lacking. The windshield opening is way wrong, the curved corners are too "tight". The lack of a grille is unforgivable even if the front clip is meant to be a fiberglass unit, most guys used at least the upper part of the stock grille.
The Willys pickup comes off better because Revell's people reused the masters from the earlier coupe kit. The grille opening is different but they reused the Electroline headlamp conversion that was on the Stone, Woods, & Cook coupe. The Henry J body seems pretty accurate too.
One of my brothers had a 1:1 Austin pickup. Those were converted one by one from four-door sedans. The rear panel of the cab was a crude stamping compared to the others, and there was a lot of asymmetry in the fasteners on the pickup bed and the conversion in general. It looked as if the person working on one side wasn't in too close communication with the guy working on the other side!
--Mark