They they are 100% not falkeri and they were identified but person who owns Falkeri and breeds them here in US. These are those Falkneri look alike rays that TFD and others were selling in past from Peru and are just very nice spotted Castexi.
I dont want to get into throwing peoples names around but these are not falkneri and confirmed by more then few different people. If they were Falkneri I would have bought them myself