I have heard that the tater-warm has a "thing" about it that reflexes the heat back into the fabric, rather than through the fabric like the warm & natural would.
Does that make any sense? But I do not know if this is true or not. Might be something to check into.
Good Luck, which ever way you go.
Bev B.
It does make sense to me to use the warm-tater that they recommend, if they have that special heating thing to it.