Well, from what I've learned through this forum, fibro tends to treat everyone a little bit differently. Some remedies help some people, but do nothing for other people. Some people hurt so severely that they can't even walk or move their limbs, while others have full function, but are just in pain. I know that for me fibromyalgia is a symptom of my deeper root issues, but for other people it may be the root issue itself. It's hared to say.
Also, there are many health issues that act like fibromyalgia. It's often misdiagnosed, because doctors really don't understand it well enough.
So, different forms? Possibly. I just know that it's a personal struggle for everyone, and it's hard to relate exactly to anyone else with it.