You can't have it all when it comes to subnotebooks. If you value a super-bright 1000-nit display, then the HP EliteBook x360 will be the best option. If you rather have a proximity sensor for hands-free login, then you'll have to go with the Dell Latitude.
https://www.notebookcheck.net/Dell-Latitude-9410-2-in-1-or-HP-EliteBook-x360-One-factor-might-be-the-deal-breaker.491359.0.html