the main differences im noting:
- the mouth shape with aureus looking like a similar mouth shape to the eartheaters and ellioti more rounded.
- the deeper red on the aureus belly area and top of the dorsal.
- the black barring on the aureus is bolder than the ellioti.
- the ellioti seems to have less visible barring but a bold black spot midway along the body.
- a lot more blue spotting on the tail base and thicker blue lines on the rays of the tail.
- areus has more blue on the rays of the anal fin with thicker more continuous lines whereas ellioti has blue spots on the rays of the anal fin.
- rays of the aureus dorsal fin are continuous and thick blue lines where the ellioti's dorsal is more spotted blue on the rays.
- lips look thicker on the aureus.
this is just comparing the 2 side by side but i suppose some or all of what im seeing could be dependant on care levels, stress, dominance, genetics, etc.
hope that helps a little, this is the first time ive tried stuff like this, outside of GT/blue acaras, so i apologise in advance if its useless.