There are many kinds of Buddhism and at least five different kinds of Quakerism, ranging from Evangelical, 'bible-believing' Quakers who, along with their founder George Fox, see the 'Inner Light' that is at the centre of their religion as the Christ of the bible, to (at the other end of the spectrum) Quakers who are practically indistinguishable from Eastern mystics in the traditions of Hinduism and Buddhism.

Buddhism is NOT a religion without dogma, hierarchies and scriptures. Nor is Hinduism. Probably the only religions without scriptures or regulatory documents of some kind are animistic ones. Even Evolutionism has 'The Origin of Species' as its founding scripture! \:\) And even animism has some hierarchical content.

Nor is most Buddhism non-theistic. Some Buddhists will say that "pure" Buddhism is atheistic, but pure Buddhism hardly exists anywhere. Most folk Buddhists worship idols of golden statues and offer sacrifices to spiritual beings they generally call gods.