Taft was willing to let the rest of the world be run by fascists and communists; Goldwater wasn't.
Taft was in favor of the U.S. entering WWII. And as most people here mentioned, domestically Taft and Goldwater were pretty conservative. They supported big business and opposed large govt. intervention in the economy. On foreign policy, Taft was a non-interventionist, while Goldwater was a hawkish interventionist.
Yeah, both of these entire posts are just dripping with ignorance. LOL @ saying Taft "was in favor of the U.S. entering WWII" and "supported big business."