There are, of course, distinctions between the two, the most notable of which is that Freud blades typically have a complete kerf. In contrast, Diablo blades invariably have a narrow kerf. On the other hand, neither of them is lacking in their ability to cut.
The Diablo blades are the superior option for an underpowered saw. And in terms of value for money, the Diablo blades are difficult to top.