Your photos are not very clear, but even more problematic is, when young
almost all species of Andinoacara look very similar, and the the distinguishable traits don't start showing up until more maturity sets in, yours looks quite young yet, and may be female (females even look more alike between species).
The Blue Acara is Andinoacara pulcher.
The GT is Andinoacara rivulatus or sometimes A stalsberg i.
And there are at least 6 other Andinoacara species that look somewhat similar.
This is one of the problems in using common names like Green Terror, in theory any of the above could be legitimately be called green terrors.
And if you got it from some big box pet store, expecting them to beep on species difference is quite the stretch.
Its like the "red Terror" dime, there are at least 2 different species called red terrors , Mayaheros uropthalmus and Mesoheros festae, I've seen some semi-knowledgable aquarists confused as to what is what, and I believe Andinoacara are even less obvious.
I keep Andinoacara coeruleopuntatus the "Panamanian Green Terror"

Even individual to individual there are subtle differences, but hardly earth shatteringly dramatic, female above, male below.

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