I think it would depend on what it is. A camera would seem to be more realistic because the camera is literally capturing a real thing. But then again, there are ways to make that object look abstract and unrealistic, with or without intentions of doing it. And there is also photo-shop now, which can really make a picture deceiving or fabricated even though we may not see it. A mirror can also make things look out of proportion, especially if it is a magnified mirror. It basically flips around everything we see, which can seem very deceiving at times. I guess it would just depend on your individual perception or view of it. Sorry I wasn't much help.. I tried though. ):
