Neck tie, but I’d love to see it comically long or at least more proportional and realistically sized. Right now it just doesn’t take up enough space, in my opinion.

That being said, if we’re “stuck” with these two options exactly as they are, the bow tie works better because it’s a more fitting size and better proportions. For me, it makes the design a little unbalanced with too much going on above the neck, too little going on below. Coincidentally, if you made it comically small, that might actually work out better, but I’d have to see it before I could be certain. However, that’s a fairly minor drawback.