A Metal Rroof Does Not A Hardtop Make
A metal roof does not a hardtop make. The term "Hardtop" is reserved for the 1963 - 65 Ford Falcons that do not have a post between the 2 side windows. Since all of the Hardtops had only 2 doors, it would repetitious to call them 2 door hardtops. A term such as "1963 Hardtop" is more appropriate.
The terms "2 Door Sedan" and "4 Door Sedan" are reserved for the 1960 - 70 Falcons that have a pillar between the side windows