Again, it depends on the fish. I have had 13" Endli, 16"+ Ornates, 13" Cong and 16" Ansorgii all with 4-5" Endli and Delhezi and there was never any issue. I have since sold the babies, but they all cohabitated for months.
I agree with Farox,
In my opinion probably Endli's are more aggressive but ornates interact more and can be prettier than CB endli's, overall I still prefer my Endli