Trump doesn't possess any business acumen. Everything he's ever had came from his daddy, and he squandered that pretty damned quickly. He has filed for Chapter 11 reorganization four times, and claims that that shows he's a good business man. Four such filings between 1991 and 2009 hardly constitutes evidence of good business practice. Actually successfully running one sound business would be better. He didn't really get successful in any "business" venture until he went into reality television. He's a fraud in his claims of business acumen as he is in just about everything else.
Politifact article on Trump's Chapter 11 filings.
Zuckerberg, for what every flaws or foibles one may allege, has accomplishments. Zuckerberg and Moskovitz set up Facebook from a dorm room in their sophomore year at Harvard. Zuckerberg had already been writing successful code for machine learning and a program for a machine to program your music for you based on previously expressed preferences. He is now estimated to be worth in excess of $70,000,000,000, making him the fifth richest man in the world. Although he drooped out of Harvard in his sophomore year, he was given an honorary degree from the university just after his 33rd birthday this year.
Trump is a small time petty BS artist who whines and consistently lies about his accomplishments. Zuckerberg, on the other hand, has genuine accomplishments one can point out. I'm not terribly impressed with Facebook, and have no reason to want to see Zuckerberg in the oval office. But I can readily see the difference between genuine accomplishment and a line of BS from a has-been reality television "star."