Okay, so you're clear on the part where the FBI decided not to press charges and described her behaviour as careless and irresponsible but not criminal, right?

Who isn't pro-life either? Or is this all about the Supreme Court and a shot at overturning Roe v. Wade?

Morality aside, I don't think they're quite on the same level of 'stance-changingness' (loving the neologisms here ). Hillary has flip-flopped enough to deserve her dubious reputation in that regard, but at least there are also a number of things on which she's constant - though one of the obvious ones is her being pro-choice, so hardly a point in her favour in your book.
With Trump, I'm not being facetious when I say I have absolutely no idea what his true position is on almost any important political issue - and my distinct impression is that that isn't because he's so good at hiding his real beliefs, or at faking beliefs he doesn't truly hold, but rather because he simply doesn't have fixed stances, lacking sufficient interest in the issues to develop any. I could be wrong on that second part, obviously.

Try thinking of it this way: by electing Clinton, you almost guarantee a devastating midterm landslide for the Republicans in 2018, considering the Senate map.