A discussion over SLAs recently helped me define one difference between businessmen and entrepreneurs. Entrepreneurs generally have a huge appetite for risk, they know that things might go wrong and that they might go wrong catastrophically but they go ahead and do something anyway. A businessman on the other hand waits until something is so safe that anyone could do it.
For the entrepreneur doing and doing it first is everything. For the businessman it is about doing it right and hopefully doing it better than everyone else.