I think the only problem with the necktie is that it looks like a flat texture. If given some volume it’d work really well. As for witch to use i’d prefer the necktie since it it doesn’t leave the torso like a blank canvas;

Utimately it depends on where in the game the duck is going to be seen first, first impression matters a lot. If it is in a really plain room, like a barren office with white walls the colors of the bowtie might give some contrast with the blandness of the room; If the room is more caotic, seeing the duck more “put togheter” than it’s surrounding helps break with the ambient.

With that though i need to say that i am colorblind, so take my 2 cents with a grain of salt.