Your question contained the phrase: "I am curious."
You need further clarification, is it not so?
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These are not religions that you are concerned about, these are known as philosophies. They are a point of view. They are contained within the spectrum known as the intellect.
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I have followed some of your answers and some of your questions.
You have a curious nature. You are yearning for the truth, is it not so?
The truth can be only found within the heart of one known as a human being. That is the abode known as the truth. That is the depository where the truth is stored, till you are ready for it to be exposed.
There are only four true religions, just like there are four directions, four elements, four seasons, four arch angels.
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There are limbs off of the tree.
There are branches off of the limbs.
There are twigs off of the branches.
There are leaves off of the twigs.
"They make up what is known, as a whole tree."
The whole tree is what we are searching for, is it not so?
Follow your heart, for that is where the truth dwells!
"Peace be always with you."
*footnote - Dearest Peace, may "That" which you are looking for, hasten and find "You"!