Corporations and LLC's (limited liability company) actually share many of the same characteristics. The most important of which is they both offer limited liability protection to its owners. This means that usually shareholders can not be held liable for the debts and obligations of the corporation. In other words, you won't have creditors knocking on your door for the debts of the corporation. In a partnership or sole proprietorship the owner's personal assets may be used to pay debts of the business. With an LLC, the members are not personally liable for the debts and obligations of the corporation.
Now, there are many important differences between the corporation and LLC but a major one is how they are taxed.
An LLC is a pass-through tax entity so there is no double taxation. This means that the taxes are passed through the corporation to the individual tax return, a great benefit for a foreign individual who doesn't have to deal with taxes at the individual level. Any income or losses shown on the company tax return is passed through.
With a standard corporation, the corporation is completely taxable and therefore corporations pay tax on their earnings. So there can be double taxation because the corporation is taxed as well as individual dividends.
For non U.S. residents the LLC is a great vehicle to do business in the U.S.
