@ km34: Good post, thanks for your explanation. I can't argue about there being too many unknowns for an accurate comparison.
@ NY: It looks like "can't be compared" is going to be the majority view, though I'm curious to see if there's any exceptions.
@ Jane Q: It's true that we have many squishy boundaries here. It's not a very scientific study, just a collection of opinions.
Love means never having to say, "Put down that meat cleaver!"