...aren't as big as many people seem to think. They're both right-wing authoritarians with very similar ideas and ideologies. They're exaggerating their differences right now for the elections, but that's not an accurate representation of reality.
Here's an interesting link:
http://www.digitalronin.f2s.com/poli...selection.html
For full effect, take the test yourself and see where you end up. You might be surprised.