Whenever I’ve heard ‘Founder’s Stock’ thrown around it is actually referring to the price per share rather than any elaborate voting rights. Most founders will purchase the stock at par value instead of the valuation price that might follow financing (which is when most employees would join). Any employee would love to get the founder’s price on the stock since it’s usually fractions of a penny.
The other major difference is that Founder’s typically own shares instead of options so they have inherent long term capital gains benefits (since they don’t have to take a hit when exercising the option). It also means that you retain the voting rights associated with the shares instead of waiting until you exercise your options when they vest.