Tonally, bridge pin changes tend to be subtle, unless you're replacing the plastic ones Taylor puts in GS Minis and up to and including Series 200 guitars. (Taylor, I think hilariously, won't admit they're plastic in the specs, they call them "Black".) Noticeable difference in sustain and dynamics changing from plastic to ebony or other better materials. Beyond that swap, it gets more subtle, if perceivable at all.
Primarily for cosmetic reasons and to "make it mine", I've used FWI (fosselized walrus ivory) on my 812ce DLX. It compliments the light maple binding on the soundhole and purfling on the top very nicely! Plus its cool to realize the material is hundreds to thousands of years old.