Comparison
Here are some comparison pictures of the surface material. You can clearly see that the Limited has a very dense weave.
HP Omen (exact same surface as the standard SteelSeries QcK) vs. QcK Limited
Dream Machines DM Pad XL vs. QcK Limited
Build Quality
The build quality of the QcK Limited is very good; its surface is completely even, as is the bottom surface. There are, however, a few parts that stick out of the stitching along its edge a bit, which I don't think of as an unforgivable error, but surely, it could have been done better. Overall, I am pretty sure this won't in any way affect performance as I could not feel these during my testing and gaming session with my wrists or my forearms.