For me it is a very nice blend because both are in dire need for success, have one thing in common that is closely related. I think the good view you see from the positive side.
Being smart and being hardworking because those are positive attributes of a person. Working smart means you can come up with a better and new ideas that you will be working hard.
This is quite relevant. Working smart is what we gained by working hard at first. Because working hard gives us a lot of experiences in many successful things that we are doing before and makes us working smart because we experienced it already on how to do it well timely. Both abilities are ultimate guide to be a successful individual.