Let's say that to be stoic you don't have to believe in reincarnation, budha, Christ, fairies, star seeds, you name it bro hahaha

But to be spiritual you at least have to believe that there are subtle forces superior to human beings that we do not understand.

There are philosophers who believe it. And others that don't believe it.

The spiritual person usually does not focus on thought but on faith. The Stoic usually focuses on what can control "his attitude and thinking."