re: Galaxy S5 or Note 4? Opinions?

Why have you narrowed it down to those two? I haven't heard much good about the Galaxy S5. Most people here will tell you it's trash, but not whether that sentiment is based on experience or on what other people have told them, or based on nothing. But as I said, I've heard mostly negative.

Note 4 is more aptly comparable to the Nexus 6. The question is whether you want a phablet (Nexus 6, Note 4, iPhone 6+) or something smaller (plenty of options besides the Galaxy S5).