The screen size (UHD) I find to have no use for me on a laptop. You gotta scale up everything on laptop monitor anyways, as you do not want to have your face glued to the screen to see stuff, so for my opinion 1080p is enough.
The ram depends on what you are working with. If you got multiple dockers or vagrants running, you might be even lacking when having 16gigs of ram. I've hit that 16gb mark with my work laptop, but if you aren't running any virtual machines, then you should not worry for this
