I think they are the same thing. Btw light level makes a big different. I have a 2nd group in a shaded aquarium and they are much more pale - they behave pretty much the same - so far they are behaving fairly gently and calm though if startled they will hide in the bottom and i think hiding places should be provided (i.e, i wouldln't keep them in a bare tank); I did something to startled them the other day and all 8 of them dashed to the bottom to hide - but now they have gotten used to me mingling with the plants and doing water changes they mostly just ignore me and stay high - the more comfortable they are the higher they seem to go.They look lovely, a store here (Ecuador) is meant to be getting some tetras soon that they are calling "Tetra zaramizina", I am wondering if they are the same? They possibly come from a location close to that of the Amaya pencilfish as these will arrive in the same shipment, though I can't be sure. This is a screen shot taken from the video they sent on the WhatsApp group, obviously these fish are in far from ideal conditions and I expect would colour up more when established.
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