Neither.
I think that if robotic technology has advanced enough to make cybernetic replacement of body parts viable, then it would also be advanced enough for me to have a decent suit of power armour or a big robotic exoskeleton instead.
So I would go for the option that is like cyborg prosthetics, but instead of replacing my body parts, they're all connected together and armoured and controlled by me resting safely inside an armoured compartment in the middle of the collection of robotic killing limbs.
I think that if robotic technology has advanced enough to make cybernetic replacement of body parts viable, then it would also be advanced enough for me to have a decent suit of power armour or a big robotic exoskeleton instead.
So I would go for the option that is like cyborg prosthetics, but instead of replacing my body parts, they're all connected together and armoured and controlled by me resting safely inside an armoured compartment in the middle of the collection of robotic killing limbs.