I have no idea where to put this, it is not an issue really, just always been curious as to why.

The weight slider when you are creating your character is a tad odd, the maximum weight changes the cloths the character is wearing to a darker shade (probably just shadows, but still it changes).

I want to know if it means anything (probably not)?

No, it means nothing. You're simply using a heavier weight version of the armor mesh.