More than likely they are red shoulder Manacapuru...
You are lucky, cost more than peru, but the center strips on both fish are kind of fade away, not sure what cause this. Give them three month or more, see if they fully express red on their shoulder, darken strip, and, smooth long pelvic fin.
I have non red shoulder Manacapuru(river Manacapuru), the pair you have are the red should(lake Manacapuru). They are from the Rio Manacapuru region, Brazil.
when I got my Manacapuru, they also had fade/uneven strips, and twisted pelvic fins, but now all ok.
a picture I took in December, about two month I got them. now they all looking much better than the shape shown in the picture.