Hey Marc. Evernote for me is pretty much just generic research and stuff I find on the web. Anything personal at all ends up in DT. The one thing I’ve been on the fence over are seminar materials and notes from CLE courses. I like how DT can display OmniOutliner outliners, but ultimately I think Evernote’s availability everywhere will win out.
The short answer is anything pertaining to me (like your Amazon example) goes in DT. Anything else goes in Evernote. Stuff in the middle, I lean toward Evernote.