Are HumanBodyBones the same as Indices in the struct BoneWeight?,Is the boneIndex in the boneWeights struct the same numbers as in the HumanBodyBone enum?

I am currently working with two meshes with the same animation rig. I need to determine if a vertex of one mesh and one of the other belong to the same bone or not. Currently I don't get a single match. Is it possible, that the bone index of an imported mesh is not directly tied to the animation rig? And with that do these Indices not reflect the HumanBodyBone enum?