alt Hacker NewsI think it depends on the ESOP, the companies i've worked at ESOP happened at 10-15% discount of the real price at the buy time and those stocks are instantly sellable. They can be taxed differently yeah but depending on how much you are buying and sell its capital gains tax which can be lower than income tax.
Edit: I am conflating RSUs and stock options never worked somewhere without RSUs so there might be a gap in my experience
Options are a bit riskier than RSUs. If you have RSUs issued at $100 and the stock goes down to $50, then your RSUs are worth half. If you have the option to buy stock at $100 and the stock goes down to $50, then that option is worthless.