Notice the asymmetry and relative tininess of the knot. You can also see the top of the second fold. Why? Because the four-in-hand screams "I don't know shit about proper dress and bought my first suit off the rack two days before I interviewed for this job."
Compare with the more robust full windsor:
Symmetrical. Sizable. Better dimpling of the tie. The knot's extra real estate is incredibly important when wearing wider-cut European collars. However, it's never so wide that it looks ridiculous. Balanced and timeless, this is the knot you should be wearing.
