A little confusion, so let's clear that up first...Spirituality & religious dogma are not the same...Spirituality is the motivation to seek inner truth, and the gaining of understandings of our reality and what we are here...this comes from many sources & experiences. Religions are of specific doctrines, or belief rules, that their members are encouraged to follow...most utilizing only one text of writings as the source of these beliefs.
Now that we have that cleared up...you can imagine the differences in the many religions there are to choose from...each with their own little rules & regs. that keep them separate from each other.
Each of these have different views on how to live & what happens after your body dies, and each have their own ideas about God & Creation...of course, each deeming themselves as the only one that is right.
You can discover these differences by exploring...go to masses or celebrations...ask about of locals & their cultures...read some of their texts, make appts. to discuss the doctrines with church leaders...take a course in world theologies...very interesting, to say the least.
The art of taking from this exploration those things that make YOUR soul chimes ring and simply leaving the rest, is called spirituality...See??? Good Journey!!!