the skinny guy is probably healthier.. but what good is health when the fat guy starts eating him..
I do not know.
I don't think many people have a real clue either.
It's quite a complicated thing to determine, especially when using vague parameters to define the domain.
That's probably a question only a doctor can answer...but it also varies from person to person.
There's no way of knowing, despite most people's conditioning to believe all fat people are at death's door. Even us "morbidly" obese people. Every day I dance and most days I hoop or go for long walks with my kids and dogs. My BP is good, my cholesterol is low (or good, or however they determine it) I have no blood sugar issues and my worst health issue is wonky sinuses. How many people can say that at 43? Well I weigh 270 lbs.
The obese person.