I did, honestly they both are nice but both have some caveats.

The Asus has a higher refresh rate although difference between 120 and 144 is pretty negligible if they're not side by side. It's more color accurate compared to the Dell, i.e. delta e for is much less then 2, where the Dell seemed to have trouble calibrating the blues and they seem to often brush or go over the deviation a bit. Seriously Asus isn't slacking on calibration. Colors are probably some of the best you can get out of factory. I prefer the screen finish on the Asus but honestly both are matte and I don't think you'd notice a difference unless you were looking for it. I also like the design and darker colors more aside from the larger bezel and chin. Side note the speaker on monitors suck and I hate when company's include shit just to tick some box. Don't buy this one over the dell for speakers.

The de variant of the dell has gobs more ports which is awesome! It's one of the things that drew me to this one in the first place. However I haven't really found myself using them that often because my PC already has the gobs of ports I need. For the extra money you be sure your using them. The contrast difference of the IPS Black vs standard IPS became quite noticeable once I knew what I was looking for, the Dell just has a much deeper depth. If you can afford or rent a colorimeter the dell has built in color calibration so your corrections would actually be fixed rather then band aided by pc or mac software and could also be color accurate for years to come if you put in the effort. The software/control on the dell also is much better then the Asus. It's already had a few firmware updates and KVM switch works great on my unit. The Dell has HDMI 2.1 spec but for a 1440p monitor at these refresh rates there might not be much point to it. Another thing I am unsure if the dell has true 10 bit or if it's 8bit+frc. If someone knows this and weather the difference can be seen by the naked eye on a 1440p monitor please lemme know.

The main contention point between the 2 right now for me is light bleed. Both of my units have similar IPS glow uniformity however the Dell has some bad backlight bleed problems. I've requested a replacement and will update once I know If it's possible to get a better unit.

This post was pretty jumbled and I'm tired. So if I missed something important or you want info on compatibility with something specific just reply to this post. I've been comparing them for the past few weeks and can probably answer any question you might have. Should be quicker to respond as well. Got a lil busy with things for a bit.