Based on HN comments, one of the most popular non-Apple laptops seems to be the Dell XPS.
XPS: via https://downloads.dell.com/manuals/all-products/esuprt_lapto...
- 15.61”
- 4.14lbs
- overall dimensions 14.06 x 9.27 x 0.66in or about 86in^3
Apple 16” MBP: via Apple.com
- 16” screen
- 4.3lbs
- overall dimensions 14.09in x 9.68in x 0.64in or about 87.3in^3
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So weight/screensize ratio:
Dell = 0.27lb/in vs Apple = 0.27lb/in
Screensize/bodysize ratio (higher is better):
Dell = 92.7% coverage vs Apple = 93.6% coverage
So just using your first two arbitrary criteria, seems Apple’s 16” laptop is ahead of or tied with, but not “well behind”, this competitor.
I’m sure you can pull out some edge case laptop that beats it, but as the XPS is arguably the most popular non-Apple laptop among devs, I feel it’s fair to say the Apple laptop is definitively not “well behind the competition”, at least using your criteria.
For a laptop that’s <3oz heavier and only 1.3in^3 larger dimensions, you get a screen almost a half inch bigger, almost 20% larger battery, the worlds best trackpad, 8 core i9 vs a 6 core i7 processor, option to get 64gb ram rather than being limited to only 32gb, etc etc.