But isn't that the case on all of Auto World's basic range, with "fast & smooth rolling wheels" ?

About those two Greenlights, they share the same design problem : the side windows are inserted from outside - which is standard procedure for collectible 1/43 models, for instance - but you can see the body metal through these windows ! Either the windows should have their edges and pillars painted in black, or the excess visible metal should be eliminated from the tooling.