Dell P2721Q

P2721Q is $520 $100 difference and I can't find any difference.

After trying my fair share of 4k monitors non of them really did it for me. I had some better ones (LG UHD 27UL850 for example) and some really s\*itty ones (currently I have DELL P2721Q and it is REALLY bad, not just brightness wise but the panel quality is somehow worse than anything 4K I have seen before). Even in case of the good ones I always tend to look more on the opened macbook next to me since the PPI is so much better and everything just looks clearer.I also have Zoom calls few times per day so I require good webcam, mic and speakers.

All in all, I cannot see why would you go for a Dell P2721Q over LG. I'm only waiting on U2723QE pricing and new IPS Black LG monitors this year, I'm afraid to buy 27UP850-w until I see the new monitors LG prepared for this year.

Altho, a dark mode extension helps. And I'm not sure if the P or S series have whiter whites. And of course as you say, the P2721Q and U2720Q have USB C hubs with PD, so they can be used with the redesigned XPS 13 9300/9310 that annoyingly have only 2 total USB-C thunderbolt ports.