One of the ways to determine a festae, from a uropthalus, is the caudal spot.
In festae the spot covers the upper half or so of the caudal.
As below
Male festae above, female below
This is also a way of determining many Soft American cichlid sfrom a Central Americans
Above the S American Mesoheros gephyrum.
In most Central and North American cichlids, the caudal spot is more centered in the middle of the caudal, and sometimes covers almost the entire height of the it (as you see with uropthalmus in my video above.
Or below some more North/Central Americans below.
A young haitiensus above, Rheoheros lentiginosis below
Wajpamheros nourissati above, Chiapaheros grammodes below
Amatitlania cutteri above, Parachromis motaguensis below
