I have to believe they are collected in Peru, but yes they do look a like. The information I got regarding the collecting point was that they were collected in Rio Tapiche, close to Requena village. Blackwater Ph 5.5 - 6 low conductivity and KH.
I am keeping L 97, L 65 as well as L 452 for quite some time now (L 452 in fact "from the moment" they were first exported to Germany) and it is in fact quite easy to tell them apart. In real life, that is; I never faced the challenge to tell them apart from pictures (though I am confident that it is somewhat easily possible). There is little to no doubt that L 452 indeed originates from Peru. It is certain that they are distinct from L 97.
By the way: it is not necessary to play around with water parameters to get L 452 to breeding: they spawn in regular tap water (450µS/cm, pH around neutral).
"What gets us into trouble is not what we don´t know. It´s what we know for sure that just ain´t so." --Mark Twain