It really is tough to compare the two because they are so different.
Craftsman tools pride themselves in their American-made status, top-of-the-line durability, and high-quality standards while Tektons tools are proud of their low price and very cheaply manufactured products.
The best way to decide which one's right for you would be to identify what your needs are.
If you're looking for a tool that will last a lifetime then Craftsman would be what you need, but if your goal is something affordable with no time limit warranty then Tekton should suffice.