I have both of them. I should have a shamans review out soon.
They are both very well done, and it's going to be a hard choice.
In most basic terms, GR's Shaman's Handbook fits the shaman to the system, and ED: Shamans fits the system to Shaman. Does that make sense?
Shaman's Handbook basically makes the shaman very much like the existing core classes which makes it an easy fit. Also, the text takes into account existing d20 system creatures that might be classified as spirits. It gets domain spells from spirits. It is also a modestly larger book, and goes into a few more topics, such as historical shamanism, the dream world, and so forth. I think I like its prestige classes a little better as well.
ED: Shamans is a lot truer to the shaman ideal, I think. Where the SH shaman has a normal spell list, rebuke spirits, etc., much like the existing classes, the ED: Shaman is built from the ground up, and gets ALL of its spells from spirits. A lot more detail goes into the nature of the spirits the shaman interfaces with. However, it won't fit so easily with an existing D&D type world.
To be honest, I am looking for ways to integrate them!
Oh, SH has better cover art and ED: Shamans has better interior art.
