What is the difference between these two products?

I have been separated from her for a year.

Please tell me the difference between these two products.

They walked down separate paths.

I think we should try a different method.

Do you know the alternative meaning?

The Chinese softshell turtle is a rare species native to China.

He wrote his name using a different character.

The separation from him was a very painful experience for me.

Separating from him was a very painful experience for me.