The two terms are not mutually exclusive. Trump is egregious in both modes. In fact, he rarely says anything true, and never, to my knowledge has admitted being wrong. Never saying you're sorry is the prerogative of gods. There's even an amusing and scholarly discussion of the topic of lies vs BS: https://www.stoa.org.uk/topics/bullshit/pdf/on-bullshit.pdf

You may peruse the astonishing list of the Mad King's falsehoods I previously supplied, but please don't bother offering in response the worn-out deflection of badmouthing Obama and the Clintons. Those sins shrink to insignificance by comparison with Trump's heroic efforts, and it's time you boys tried to live in the present. As for the cynical promises Repuglicans, and Trump, the faux-Repuglican, have made, they are destructive and wrong-headed promises that may yet be their undoing. I did get a hoot out of "energy liberation," though.