Stolen from someone.

Zuck is probably getting high quality instruction and coaching and is probably insecure enough to study hard [looks in mirror, hmm]. Plus he doesnt do shit at his one company aside from running it into the ground. He has time.

He is likely a sociopath.

Elon (I love him) is a fat nerd. Ive seen his security team in the background in SpaceX videos (one gals is a real-life analog of YT from Snowcrash).

Elon has 8(?) Companies to run. And he listens to Joe Rogan. If he is training, he is training his bots to fight for him.

Advantage in a fair fight?

Zuck

Advantage in a real fight? Musk could nuke Zuck from orbit (metaphorically but not hyperbolic) or botswarm him.