The difference is Moses has a compelling story with an interesting clash between his public persona and private demeanor. Zuckerberg, while certainly a good biography subject, doesn't have the same idealist turned corrupt by power story.
I suspect that the bigger difference is that the truth about Moses was probably little known at the time - I think most people know the Zuckerberg story by now.
Perhaps, although Zuckerberg never built Facebook in an attempt to help the public. Even the most hagiographic recounting still acknowledges that Facebook is a profit seeking endeavor. What's so interesting about Moses is the paradox of how someone so arrogant, so elitist indeed, can have done so much for the public.
For some of the public. But, for example, he deliberately made the overpasses on one of his expressways too low for buses to use, so that only people with cars could get to the beaches. This excluded the poor, and the black were mostly poor.
So "done so much for the public" is... complicated. His elitism and exclusionism was literally cast in concrete.
I haven't heard of him before but his wiki has this line in it which was extremely similar to comments I've heard about another recent person in the news. Complicated for sure.
"While bragging that he served in his many public jobs without compensation, he lived like a king and similarly enriched those individuals in public and private life who aided him."
Agreed. I'm not claiming Moses was necessarily altruistic. But he did something for the public, while I'm not sure Zuckerberg, besides the odd charity work, has anything close to that