Actually it looks like both of those studies came out very closely to each other, so the one I linked to must have been referencing another set of studies. I suppose the only conclusion we can come to is that the evidence to determine in either way is inconclusive, with some researchers arguing that schizophrenia progressively leads to brain deterioration and others saying that it very rarely does and that studies showing otherwise are not taking into account secondary causes such as exposure to anti psychotics.