2 would honestly make more sense, firstly because we are primarily drawing an analogy with humans as the only known species to wear a tie and humans wear a tie at the base of their necks, not a certain distance from the top of the neck which just happens to be just a bottom of the neck, as it is the case with the 1 pic (distance from head of dinosaur to it’s tie ≈ distance from head of a human to the bottom of a human neck), plus dinosaurs have a vastly different body shape from that of humans, so it would make sense to base your assumptions not of proportions or concretes distances associated with a human body, but absolute things such as “middle of a leg” or “bottom of the neck”, the latter of which i’m using as a basis of my argument

secondly i think part of the reason people wear a tie at the bottom of their necks is because otherwise it would just slide down unless you apply a lot of pressure, which would be very uncomfortable

additionally position 1 would be much more inconvenient because the tie would bump into things and would get stuck everywhere