As much as I can't stand Trump, I certainly don't think he is going anywhere, short of a real smoking gun. But Pence is an absolute crazy right wing Christian conservative that would govern by his faith primarily.
In my mind, Pence would be more likely to push a conservative agenda and have success. But he is more of a seasoned politician, so its I think less likely he taunts a nuclear dictator into WW3.
So plus and minus on both sides. But in the end...Pence........I don't agree with him on much, but he would be MUCH less embarrassing.