Obviously they are different by specs!
However, the 32GKxxx hit that right mix of features to make it stand out. There are plenty of 27" 1440P G-sync monitors out there, but very few 30" 1440P G-sync. And while the link does show the vertical height of the this monitor is actually less than a 31.5, it is an inch taller than the 34" wide screens.
Personally, I have not bought a wide screen because of the lack of vertical space. However, the extra vertical inch of this model may be tempting enough to illicit a purchase for myself and at least a few others. And in that regard, this monitor may have 100's of pages of posts similar to the 32GKxxxx.