This is the impression I have so far: True tung oil seems much better for developing patina, fixing scratches, etc., but twice as expensive. Argh. (Why is everything good more expensive???) Also, be careful of various blends out there.
This Old House forum conversation
Woodworker's forum (more details on various blends versus pure tung oil):
How to finish with tung oil (note: it doesn't work with miniwax stains):
Kind of funny -- how a tung oil floor is like a well-seasoned frying pan