Transfer Weight paint and Armature

I realize this is probably ambitious and I won’t likely get what I want, but I wanna ask anyway. I have a model who is 6’ 4” and full of muscle. I have a scrawny model who is 5’ 1”. One of them has a perfect armature and the other has a perfect weight paint. Is there a way to translate armatures and/or weight paint between two models of differing sizes?

i find i get a better response when i add a picture

His armature is perfect, but I’m not so worried about that. I can edit that to any one of my 50 characters in less than 10 minute.

Her weight paint is perfect, but it was a long tedious process that I don’t want to sit through for my other 50 characters, who all have a weight paint but hers I’m actually proud of.