No result holds in every circumstance. Prices change, options open and close, priorities shift. The useful question is how much would have to change before your answer did.
Your Decision Kit spells this out. If the second option would move ahead with a small change in how much you value one factor, you'll see that. If a fact about the leading option turned out to be different, you'll see whether it would still keep its place.
Some results are stable: it would take a big shift in priorities to change them. Others are close, and a small change tips them. Both are fine to act on, but they call for different amounts of caution.
It also tells you where more research is worth doing. If the result hinges on one uncertain fact, checking that fact is a better use of your time than going over everything else again.