Last year, the Pixel 2 was hailed for its Samsung display while the Pixel 2 XL was heavily criticized for its LG panel. This year, though, it would appear that tables have turned, with the more expensive phone opting for the traditionally better display.
https://www.notebookcheck.net/The-Pixel-3-XL-may-use-a-Samsung-display-but-the-smaller-Pixel-3-sports-an-LG-one.338898.0.html