If you're feeling a lot of distress and life is a struggle, you would probably benefit most from individual therapy.

If you and your partner are having serious relationship difficulties, relationship therapy would probably be the best choice.

If you want to create a more fulfilling life, and you're ready to work on setting and pursuing goals, individual coaching is probably the best choice. 

If you and your partner want to work on creating a strong relationship that can endure, relationship coaching is most likely the best choice.