My puny game programmer physique cannot handle heavy laptops but my puny game programmer income cannot buy nice and light laptops. I still use my 2011 ZenBook that with its mechanical HDD takes over 10 to minutes to stop coughing after boot.
Of the two I'd prefer the Blade Stealth as 4k can fit more editor and Visual Studio on screen at once but honestly either one would be a huge upgrade. Mostly I want faster storage, more RAM and a better CPU.