I don't get what you mean by "technically not in the same ballpark". This monitor in the review is still only a 100 Hz monitor. The only difference between this monitor and the Pixio is the panel. It's not like this panel has shown stellar performance either, with middling color performance. A VA panel is better for gaming due to the higher contrast ratio.
It is a 120Hz monitor, even the title said so. At least for the other 3 models I referenced, they are all GUARANTEED to have 120Hz. This is big in a way because we are so close to 144Hz UWQHD. No, the Pixio is not able to hit 120Hz, and I will not debate whether IPS or VA is better for gaming because they each have different strength and weakness. To make things clearer, I have referenced Crossover (Korean Monitor)'s own 34U100 (which is exactly the same as Pixio's) and their own more recent, 120Hz UW3535, which cost $200 more. You may not find that extra 20Hz worth $200 premium, but a lot of people will. Same thing with QHD 120Hz monitor back in the old days.
If anything, check out the AW3418DW. It seems to be a superior monitor using the same panel as the X34P.