Ive been researching laptops for photography and video editing, for myself.
Ive basically settled on getting the Dell XPS 15. 4k screen. 7700hq 1050 ti 4gb.16-32gb
since i need it for travel it seems ideal at 4.5lbs where as a budget 1080p screen inspiron with same specs is 5.5+ lbs(not 4k, thus worse colors on the screen that you need for photo editing)
4k screen seems to be ideal for photography(and if you edit video in 4k) and the screen would cover the full spectrum of the colors you need for Photo editing... but the drawback is power consumption
Since i need more CPU power for video processing, you might be able to get away with a lower spec cpu(still probably want an HQ processor)
Dedicated graphics card doesnt need to be awesome. thats why im settling with a nvidia 1050ti 4gbhttps://forums.d2jsp.org/topic.php?t=77515820&f=189
and a few other threads seem to agree i found a decent Non-mac windows laptop for my needs
If you go mac you will pay more, but their screens are some of the best.