Is a 48 series sedan an FX, or not ?
My take on this, is a bit less pedantic. I would suggest that the GM-H engineers, back in 1980-81 when the VK was on the drawing board, would've referred to their upcoming model line as the VK Commodore 'range'. It would've been later in the game that marketing decided on the top-line version being re-badged Calais. Let's face it a VH Commodore SL/E & a VK Calais are equivalent & sequential models & to me at least, they are still both Commodores.
Again with the Ute. In its gestation, the engineering brief would've been to design a Commodore Ute. What it gets badged comes much later & as has been demonstrated on several occasions, not very consistently.
Even the V2 Monaro was known as the VT Commodore coupe in its design & car show period. The V2's Monaro badge came after much soul searching. I was actually involved in that process (I will tell you about that at another time) & the GM-H board members were still calling it the Commodore coupe, during those discussions.
The original HK coupe was a totally different scenario. During its design phase it would've been called the Holden coupe, because in those (pre-Torana) days they were all Holdens, so no different name was required. By the time it arrived however, it was badged Monaro as opposed to Belmont, Kingwood etc. If you go back a little further in time, say to EJ/EH days, the Premier was a fancy Special, which in itself was a fancy standard, but we did not differentiate them, they were all simply Holdens.
A lot of this was compounded when Holden became a marque, when at one time it was just a model of car that a company called GM-H built, i.e. the Holden sedan (48-215). Today the name Holden is just a marque which sells many products, everything from Barinas, Cruzes, Traxes, Malibus & Captivas to Commodores & Colorados. Nobody goes into a dealership anymore & asked to drive the new "Holden'. They will say Commodore or Barina, or whatever.
I think to keep it context, Commodores, Calais', Berlinas, Utes & Monaros, even Statesman & Caprice are all Commodore based so therefore all part of the Commodore range, badge or no badge.
Dr Terry
BTW, Happy New Year to all.