About a month ago I had a Flowerhorn and two other Midas in addition to the Midas I have now (along with the other fish too). Well, I got rid of the FH & two other Midas because I found out they were females. This Red Isletas was starting to pair up with one of the Midas and showing some aggr, but since I took the females away I have had zero issues. To answer your question more direct, no they are not as aggresive in my opinion. Aside from that short time period (1 month or so) He has never been aggressive with any of my other fish and is pretty nice for an Amphilophus.