I think that there is ambiguity in the wording. It's simply not straightforward dialogue, and that, to me, is what is interesting about it (but clearly, others may feel differently). But let me address a different point--these are not the same Janeways. The point of the episode, I think, is to question how much experience changes and shapes an individual. Certainly, they may be nearly the same person, but they also arent, a point reinforced by the dialogue that Harry Kim (perhaps not the "real" Harry Kim) and Janeway have at the very end.