To the untrained eye, exercise is exercise; meat is meat; soap is soap. But when you go in depth, every exercise has its unique benefit that other ones might not. It's the same with dhikr. Each dhikr is a fast-track to a different benefit:
For rizq/wealth - istighfar
To strengthen iman - Quran
When challenged - Allahu akbar
For contentment - al-hamdulillah
To increase awe of Allah - subhan Allah
For protection from doubts - study of aqida
For victory - la hawla wa la quwatta illa billah
For ease of anxiety - salat on the Prophet ﷺ
For cutting off dunya/distraction - la ilaha illa Allah
For protection from punishment - istighfar & sadaqa
For smoothing of character - salat on the Prophet ﷺ
For protection from humiliation - kindness to vulnerable
For protection from enemy - hasbi Allah wa ni'm al-wakil
For protection from consequences of own errors - la ilaha illa anta subhanaka inni kuntu min al-zalimeen