What is the difference between a hardtop and a coupe 1965 GTO?

The primary difference between a hardtop and a coupe in the context of the 1965 Pontiac GTO lies in their roof design and construction. A hardtop features a continuous roof without a traditional B-pillar, providing a more open feel and easier access to the rear seats. In contrast, a coupe typically has a more defined structure with a B-pillar, which can result in a more enclosed cabin. While both styles offer sporty aesthetics and performance, the hardtop is often favored for its sleek look and additional visibility.