Whoever trusts in Hashem, believes in Hashem.  

But not all that believe in Hashem, trust Him. 

Emuna is like a tree and Bitachon is like the fruit. 

(Many trees don’t bear fruit, but all fruit come from a tree).  

~ Ramban

Emuna is a concept, a belief in Hashem.  Hopefully, we all have this.

Bitachon is the reality of Emuna, living a certain way and applying that belief.