I'm told that it's important when stringing a guitar to have the pin pressing the ball of the string against the under part of the bridge (my termninology is woeful, I know) rather than burying that ball all the way beneath the pin. For that reason I assume that that part of the deal has more to do with vibration than one might assume, and therefore the pin material would make a significant difference. I too have heard good things about fossil but have yet to experience it. All the best, Andrew