No, his degree is in Finance. Somewhat different. Finance has more to do with how to structure deals, including what financial instruments lenders/borrowers can use, the tax implications and the law. Economics has more to do with behavior of markets and resources, as well as the effects of macro regulations.
Yes, there is a difference, but it helps to understand both. For example, I read Trump’s “Art of the Deal” over 30 years ago. Did several smart things I would not have done without those insights. First, sold underground coal rights to land my husband inherited. Then found a partner and the 3 of us bought a house together using that money, and a few years later repaid the partner’s 10% share $4,500 on a $2,000 investment. Husband and I didn’t have enough income to finance alone. Some time later did the same thing with two partners, whom I subsequently bought out. Asked my mother to loan me my inheritance to do that. Those deals were finance, but deciding how the local economy was changing and where it was good to buy was essential, that’s economics, and increased value has been tremendous as those two neighborhoods are very trendy now but almost slums when we bought. Finally, I was distressed I only had one grandchild, and my 2 kids could not save enough to move out of one bedroom apartments. I had an equity line of credit and gave them each $10,000 toward house downpayment. They each bought a 3 bedroom fixer upper and I now have 4 grandchildren. Trump also has to understand economics, not to mention psychology, to know what deals are worth financing, and he does.