Actually, my perception is always correct, so you can always trust me...except for when I'm wrong.
I think that the similarities are basically just those superficial things too. I didn't mean that Spirited Away was a copy, but just that there is similarity in the basic premise and types of event that happen to the little girl. The concrete aspects are definitely very different.
The differences are even more profound when you are familiar with Japanese religion(s) and folklore. A lot of the "weird" stuff makes more sense. (Well, a LITTLE more sense, anyway!
)
Spirited Away is one in which I find something new each time I watch it. There are so many fun little details, that it's like doing one of those "Where's Waldo?" books.