This is just a guess, but....
Could be that, since those resolutions are in the ballpark of "twice" what you would see in most laptops (2x720p, 2x900p), the high-DPI setting the screens use just makes it a much sharper equivalent of the lower resolution in terms of actual screen real estate.
i7-8700k, Custom Water Loop | ASRock Fatal1ty Gaming K6 | 16GB DDR4 3200 CL16
GTX 1080 | BenQ 24" 120Hz | 2x Samsung 840 250GB | 2x2TB HDKPC09 | Win 10 Pro x64
X-Fi Titanium Fatal1ty Pro | Sennheiser HD555 | Seasonic SSR-850FX | Fractal Arc Midi R2