I had a male t. ellioti that was reallly aggressive. He owned most of my 150g which had a larger a. robersoni, h. deppi, JD, and a smaller salvini. I've had meeki, aureus, mixteco and ellioti is the most aggressive of all thorichthys cichlids IMO.
Well I'll concur with you then that this species as bordering on very aggressive.... I mean I'd not expect a 3" Flowerhorn to take on a 6" Oscar but this Ellioti is not just doing that but actually taking on two 6" Oscars!