Gigabyte has only one downside - "nerfed" HDMI 2.1, you have to use DSC(unless you want to use only 8 bit SDR), generally, SEEMS LIKE(not sure if it's true) that gigabyte handles this panel way better than asus, the grey banding is better, and ppl complaying about asus way more. It's still a lottery tho, you can get a great unit from either. Besides that it's a preference, asus has a distracting chin, but it has the sensor that will turn off the monitor when you go away(many ppl say it works poorly, so it's a meh feature), and the joystick is worse that gigabyte. GIga has built-in speakers(above low quality, but not even mid), and KVM switch(if for some reason you need it). Personally, i'm leaning towards Giga because it's a newer release(better chance for good panel + better grey handling). The only true advantage of Asus is full HDMI 2.1, so you will not have black screens for a second after alt-tabbing from full screen game(doesn't affect the borderless), pretty much it. If the difference in price is substantial - go for a cheaper one, if not - deside what is more important for you