The only difference is that we used to call ourselves "self employed." And we recognized from the get-go when we hung out our shingle or bought a manufacturing plant in Ohio that work-life balance was not in the cards.
In Tech Crunch, Blake Commagere explains how critical it is for entrepreneurial success to be obsessive with our business. It's binary: Either we live in our enterprise or we better be scanning the help-wanted ads for a full-time job.
Of course, this ethos applies to Christmas Day. We're there at social rituals, but not all-there. Our mind, for example, is processing whatevers. Within a few hours of the dinner gathering we will be back full-time on our laptops and mobile devices conducting business. Each year as the economy becomes more global this becomes even more the situation.
Success as an entrepreneur is DYI. Sure, investors can provide funds and good wishes. But, we are truly "captains" of our little niche, just like Carnegie and Ford had been.