I think that Crewdson’s photo can be defined metaphorically speaking as a mirror; since there are emotions that the author want them to be expressed through the photo such as:the embarrassment that we see in the girl that is almost naked. if we notice it , Crewdson use a lot of darkness around of the subject trying to pointed her out.
The Winogrand photo is the windows since it shows the reality of the moment; he didn’t manipulate the scene for this photo, it was a moment that he captured.
You make a good point that a manipulated photo is more likely to be a mirror and a moment that is captured is more likely to be a window.
Try to answer the question more fully next time.