As I see it, a Talisman is born, and an amulet is made. Also,a Talisman belongs more into the spiritual zone of a culture (hence related to a particular religion), and an amulet is more a magic thing (related thus to elementals, etc.). A Talisman is a Talisman is a Talisman; but an amulet becomes more so (gains power, so to say) with every day that passes being an amulet...
Among other things.