Which one is considered duplicate content?

A)
Post Number 1 :
Tittle: Key To Management Success
Content: Paragraph 1, Paragraph 2

Post Number 2:
Tittle: Key To Management Success. Good Strategy for Maximizing Profits.
Content: Paragraph 1, Paragraph 2, Paragraph 3, Paragraph 4

B)

Post Number 1 :
Tittle: Key To Management Success
Content: Paragraph 1, Paragraph 2

Post Number 2:
Tittle: Good Strategy for Maximizing Profits.
Content: Paragraph 3, Paragraph 1, Paragraph 4, Paragraph 2,

Note that from the above example: Paragraph 1 and Paragraph 2 are exact duplicate content.
The difference is: Post Number 2 contain additional information (ie: Paragraph 3 and Paragraph 4)


The question:
i) Which example are considered duplicate content by Google, thus being penalized by google? A or B?

 

If they are under the same domain, both, if different domain, then neither.

 

My opinion would be the content which is indexed first will be considered original and the other one would be taken as duplicate as the original content will always be published before the duplicate one.