That looks like it specifically calls out the slant that different sources report with for a given topic. It's not quite the same as having a reliable source without the slant (if possible), but it might be the next-best thing, and/or the most realistic solution to the problem right now.

I used to watch a podcast called Unfilter (which has ended now), and what I liked about it was that they took a story and played clips from various stations to compare the coverage side-by-side, like that website does with text.