However, household GINI is definitely the more relevant figure, as most big economic decisions (where to work, where to live) are made at the household level rather than at the individual level.
More concretely, if I divorce my wife and we become two households does that mean that US economic inequality has increased? I would say not, but the household GINI would say that it has.
Could it be that conservatives might actually be right about that?
There is also nothing "socialist" about the publication. And the fact that the stats may be skewed by certain underlying variables (like every other study on Earth, who knew) does not invalidate the findings, although it does invite for further refinement of the data for more conclusive information.
Not relevant to the point OP made.
Whether or not it's "better," it still impacts the numbers.