I cannot agree with you here. As I mentioned earlier, I believe the primary difference is that amulets are general sorts of charms; whereas a talisman is made for the person who is using it, and for a specific thing (or things) for it to do.

You can get an amulet at Ye Olde Amulet Shoppe.

For a talisman, you have to go to "Gerty the old talisman-maker," or the personage of your choice.

It is possible I have become sensitized to the use of "talisman," in terms of frequency. However, my experience is that it's used much more often than "amulet." "Talisman" is certainly used where "amulet" would be more correct.

Jamey