Earlier quoted context omitted.
And how do you feel about Google Analytics?
How do you feel about metaphors with obvious flaws?
In fact, in order to make Density to GA comparison fair former needs to report all its tracking activity to a single source. Then they will be the same both in intent and implementation. Except, of course, for GA being free.
I asked original question assuming that you realize direct resemblance between Density and GA. But since you don't, I honestly don't understand how you cannot see it.