I think you've pretty much answered your own question.
You'll also see that the one in the linked image has a tray where an upward facing vent would be top center of the dash, for a car with climatronic.
Also there is no sun sensor which would usually sit just next to the upper vent near the windscreen.
If the one you're looking at doesn't have the upper vent/sun sensor either i'd say its unlikely it ever had full climate control. If it has these and just the control panel has changed, maybe it did, but someone at some point has reverted back to standard air con for some reason?
You're right though, climatronic seems to be much more common that standard air con.