Its very hard to find the difference between the two, but for me I'll go both. I guess working hard and working smart will always be a partner. Working hard without using your intelligent is useless, we work hard for us to succeed that's why it is important that we should be smart on the strategies and techniques for us to be able reach what we aim in life. True that working hard will make our boss richer, we need also to be smart to look for a way that our lives also improves out from the salary that we got from our employer by thinking some ways on how to make our money grow out from our ideas and ability.
Both woking hard and smart play an essential role in doing anything. As far as we know that there is no easy way for us to get succesful, therefore if you want to be successful, you definitely pass through lots of difficulties and it consists of working hard and working smarter. It depends much on you, whether you want to get rich ,how you aspire to become in the future. In general, you have to identify what you need, that will help you do your job efficiently. Sometimes, I think that working hard and smarter dont bring you to get successful, You have to be more patience in analyzing what you got wrong and then finding the reason why you got failed.