Since I don't know much about either of their lives it is tough to say. Youngblood pumped iron frequently. So do I. The pump is the pump although his was more intense. Youngblood also spent all day pinning himself, popping pills, eating, and no doubt sleeping. Not a lifestyle I would ever want. Towards the end of his life, his skin was a reddish purple. I cannot imagine what his blood pressure must have measured. He abused anabolics to the point where it killed him. He also ran a stressful business on the side.
Gandolfini was a popular actor, know world wide. He was very charismatic and enjoyed life. He partied throughout the world, and experienced the life was a popular celebrity while plying his trade as an actor.
I would choose Gandolfini. Tens of thousands of gym rats lead the life of Youngblood. Very few lead a life like Gandolfini. Both should have taken better care of their health. One died of neglect, another looked like Hercules, and worked out daily, killing himself in the process.