Did Qantas do anything to differentiate the later (910k lb.) 747-400ERs from the rest of their 747-400 fleet
Visually it would seem not, they all carried the "Longreach" name, only an anorak who knew the registrations would be able to identify an ER, As you say
TD the aircraft was developed specifically for QANTAS, six purchased, so they could run LAX-Melbourne with a full load.