Well if we're comparing Breitbart and HuffPo I'd say that they're equally mendacious.

Breitbart trades in hyperbole - they will tell us straight up that refugees are mugging grannies which proves Europe has fallen or some such.

HuffPo peddles distortion - their articles come wrapped in intentionally misleading statistics, righteous indignation and snark.

Both terrible. Both hugely popular. I weep for the web.