For me personally; I don't too much say I am religious, because people automatically want to class you as a member of some denomination or sect. I don't believe division along sect or denomination or even religion is correct. I believe those who are faithful to GOD make up the separate leaves of the same One vine regardless of the divisions of man, and not due to them.
One saying they are spiritual could mean any level of things. They may consider themselves wholly Christian but not of a particular sect or division. They may understand that all life is ultimately of One source, but do not have the discernment or knowledge it takes to rightly divide their own spirit/s and motive/s. A spiritual person can even be an atheist or a pagan or polytheist, or deist in my experience. I actually know a few atheists that when pressed, will indeed agree that there is a singular spiritual source for all creation (deism).
Sent from my Moto G (5) Plus using Tapatalk