Well it might take more than 2 different save.. particularly going forward.. for instance the wild aunt quest has 3 ending, 2 at the moment are similar but will probably diff more in the way they later progress.. the siscam quest has a 5 way split at this time... One of the ways currently result in a job, and massive content. While the other 4 will have different outcomes. And as they will differ possibly depending on the linked quest to each one of them.. that could mean a few different outcomes..
I am looking in the future to bring in events that require you to choose path A in quest 1, and path B in quest 2 for instance..
so if you imagine quest 1 and 2 as a coin toss.. with H or T as the outcomes.. then only H and H would result in this even being possible..
If I do get to that point.. then no end of saves would be needed to experience everything..