auxiliary verbs - Difference between "will" and "would" for predictions

What is the difference between will and would in the following sentence? In the following news link, why is would used instead of will?

Here is the link and the headline:

Why the US would never win a trade war with China
_{CNN Business}

But in the article, will is also used

We are now moving backward. In its efforts to achieve what it believes to be fair trade, the United States has started trade disputes with several different economies. Its conflict with China is by far the most intense, resulting in a series of additional tariffs. Some people believe that because America is the net buyer and China is the net seller in their trade relationship, China will lose the trade war and ultimately surrender. I believe that's wrong.

Can anyone who is a teacher or has good knowledge of the language please explain this?