Trump and Clinton are both known quantities. Trump will be less dangerous.
Less dangerous by what criteria? You can't really be serious.
Trump is totally a loose cannon. A nutjob. A Republican US Senator called him "unhinged". And he is indeed unhinged & unbalanced by any measure.
And neither is Trump a "known quantity" in politics. He's a known quantity in business, where he's had one failure after another. If he's know for anything it's for being a slick con man, superb at self-promotion and sucking-in the gullible.
But how is he known in politics? What elective or even appointive public office has he ever held? What is his governmental experience level? Rather, The Donald is a total unknown in politics. And in operating within a constitutional democracy.
And what he's demonstrated so far is frightening. Already alarming & alienating our allies. Our international friends are appalled that this clown could even be a Presidential contender. And worry about the direction and future of the US because of him.