Well, quality is a subjective thing...
That said, from the pictures, and video reviews the 24/7 seems to be based on the same black aluminum body as the stingray, or some slightly modified version of it. It is possible they widened it a little bit as the 24/7 has 3 LEDs in each row, while the stingray only has one, but I don't think that they had to.
Ok, going back to an older thread, since I made an inaccurate assumption here.
I can confirm the 24/7 chassis looks to be based on the same ideas as the stingray design, but it not the same.
For starters, the 24/7 is considerably wider, I'm guessing they did that to fit the electronics and/or improve heat dissipation:
24/7: 3 5/16" wide
stingray: 2" wide
Also, with the stingray the edges are thinner than the middle portion where the lights are. Thus, when viewed from the side you see an edge, then further in you see the edge of the light-cover sticking down a bit.
The 24/7 has edge segments that are as thick as the section holding the lights, so viewed from the edge you only see one surface, and in general the fit and finish is a bit different.
But the differences, beyond the width, are small refinements.