Comparisons of the diffusion of ‘true’ and ‘false’ news still suffer from deep methodological challenges. Vosoughi et al. report in Science (2018) that falsehoods spread faster than the truth, yet focus only on a narrow set of stories flagged by fact-checking organisations. We complement this by systematically comparing the typical dissemination careers on Twitter of articles from mainstream news organisations with articles from outlets on the Hoaxy meta-list of ‘fake news’ sites. This identifies human and automated behaviours that vary considerably between sites, and site types.