What are the different types of bike goosenecks available in the market and how do they affect the performance of a bicycle?

There are mainly two types of bike goosenecks available in the market: quill and threadless. Quill goosenecks are traditional and adjustable, while threadless goosenecks are more modern and stiffer. The type of gooseneck can affect the handling and comfort of a bicycle, with quill goosenecks offering more flexibility and adjustability, and threadless goosenecks providing better stability and responsiveness.