> First, different browsers break text at different points.

If the screen resolution and scaling is the same, and the operating system is the same, then you should get very consistent results across operating systems. They use the same algorithm, but subpixel hinting may differ slightly.

If you stick to metrically compatible fonts for the different operating systems, you’ll get almost identical results across OSes too (assuming same screen resolution and scaling). https://www.ctrl.blog/entry/font-stack-text.html