Blue Peter has curved windshield support posts, the puzzle car has straight supports. The windshield frame of the puzzle car is wider, providing less visibility through the windshield than is available on Blue Peter. The boat section construction of Blue Peter includes at least 8 longitudinal strips, while the puzzle car includes 3. The portholes on Blue Peter are smaller, and mounted further apart. Blue Peter has a light mounted below the porthole section. Blue Peter also has a windshield wiper, lacking on the puzzle car.
They are not the same car. But it is the very same concept. Can there be just two?