Comparison
Moving on to the comparisons, the differences between the shown pads are pretty obvious. The G240's surface weaving is very dense, but not as dense as on the QcK Limited, for instance. The most obvious differences are with the Razer Goliathus Control and standard QcK, and the biggest similarities are with the HyperX Fury S Speed Edition.
Razer Goliathus Control
Razer Goliathus Speed
HyperX Fury S Speed Edition
SteelSeries QcK
SteelSeries QcK Limited
Build Quality
As far as build quality goes, both surface and backside are impeccable. There are no uneven, bumpy parts, or areas with more or less friction than others. However, the overall build quality can't be called perfect as the actual edges of the pad feature some jagged, uneven parts for some reason. They look like the tool wasn't sharp enough when the mouse pads were cut. Besides these close-up aesthetics, there is nothing else to nitpick on.