Hi @Kat
Brassy/Tea Leaf Trevally are commonly mistaken for each other, even very experienced fisherman mix them up.
Brassy has a more sloping head than a GT and that White spot on top of the gill plate I mentioned before.
Brassy Tevally.
https://fishesofaustralia.net.au/home/species/1653
Giant Trevally (Blunt Forehead) and are the biggest Trevally species in Australia.
https://fishesofaustralia.net.au/home/species/4268
Golden Trevally have those big Rubbery Lips that you can put you thumb in to lift up if you want to take a photo ....... and you wouldn't want to do it with the other 2 or you will get said thumb crushed. Smaller Goldens are a great looking fish but loose a lot of their colour when adults.
https://fishesofaustralia.net.au/home/species/4274
Like most fish, looked after, Brassys are good eating and all 3 are good in Currys as they have a firm flesh.
Great fish on that gear.