Hmm. This should be amusing...
I thought about it a few days and took a stab at it. Warning: Edits might follow if I find something goofy.
Spirituality is all about the ineffable.
Religion is a representation of the ineffable.
Spirituality is never false because it is not articulable.
Religion can be falsified because it is represented. By representing the ineffable, you've erred.
And the error is public.
Spirituality does not entail working with a community.
Religion by definition entails working with a community.
Spirituality is not documented.
Religions, aside from a few pre-literate ones, are documented, even if by oral tradition.
Spirituality need not embody stories.
Religion represents the ineffable by means of stories.
Spirituality comes from a single vantage point.
Religion is shared among many people, therefore it is viewed from many vantage points. Indeed, the stories are often about a variety of vantage points, a variety of people.
Spirituality involves little effortful learning.
Religion involves understanding what is represented. Enlightenment, if such a thing exists, is understanding how what is represented is in error, but appreciating it's value in helping grasp the ineffable.
Spirituality that is muddled can stay muddled.
Religions that are muddled can stay muddled, but not without some criticism.