I love my pigma pens and I've never had a problem with them fading or washing out. I do heat set them though, which means I ironed, er, excuse me, I pressed them with the iron after the ink had a minute to dry. I've got one quilt that has had a label for about 10 years and it hasn't faded one bit.
I have to say, when I hear the word Crayola I tend to think of kiddie projects so I have never tried them or payed much attention to them. :oops: