Faith and belief are two words we often get confused at as the same. Although it is very similar, and can be used interchangeably in some contexts, there are really some differences between these two based on both their meanings. The main difference that we can immediately see or observe is that faith is more commonly used in referring to religion while beliefs are Often used on more general contexts.
But in an easier explanation, faith is when you believe even when there is no testifiable and verifiable physical evidence that can be closely examined and experimented to be proven.
Whereas in the word believe we need solid evidence and proof of the object.

That is how i see it.