I grow and have grown hundreds of Echinopsis plants from tiny finger tip sized offsets that have fallen off big plants, seedlings, to big mature multi headed clumps all the way to the columnar giants that used to be Trichocereus. Even with this terrible picture this plant screams Echinopsis way more than the two Parodias you mention or something in the middle between them, but I am sure a better picture might help convince me otherwise, or since you appear to know so much better you should not have bothered posting this in the first place.