I've got a set of Tekton combination wrenches and some Neiko long pattern to compare it to. I took some comparison shots of the two maybe as a bit of a data point.
The fact that their logo is just etched on there rather than stamped seems cheap off the bat for the Tekton. You can also see that the stamping for the size markings is a lot sharper on the Neiko. The Tekton looks poorly done. The Neiko is a V style open end that I've seen people suggest is weaker than a conventional open end. Add to that the angle of the open end and the Neiko is awfully thin on one side. That shouldn't be the side transferring force when turning a fastener but I could still see worrying about it.
The finishing inside the open end is nicer on the Neiko, though neither is very special.
The shaping of the box end looks a little nicer on the Tekton than the Neiko. The Neiko finish is smooth but it looks kinda rounded over like it might not bite on a nut as well. It could be some kind of non corner drive design but it more just looks like a "normal" box end rounded over some. The Tekton has a slightly higher offset than the Neiko. I'm not sure what the exact angle is for either.
One other little thing is holding the wrench with both hands and sticking my thumb up in the middle, I can feel it flex a little bit if I really try to bend it. I just tried the same with the same size Wrightgrip and it doesn't flex at all. Also now my thumb hurts.
Finally, a fleet shot for the wrenches I grabbed out of the box for this quick look.