Blender releases

Can anyone explain me what is difference beatwen blender releases.
I mean bf-blender, orange blender, and other.

What is releases goal is?

Thanks.

orange blender is the blender group making a movie, working on it full time. the making changes faster than versions are coming out for the rest of us, but it will be incourparated. that the advanses in the partical engin for instance in blender 2.4 that came out of orange.

BF -blender i thinks the main development streem.

others are more experamental for features that may later be included