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>Software filter works by either dropping the intensity of blues output by the OS or by just overlaying your screen, and that monitors *do* do some post-processing and sub-pixel work and don't just display straight 1-1 256 level color, it's not going to uniformly reduce blues from all scenes, it's not going to cut out just pure blue light, and in some cases the monitor will still wind up outputting quite a bit of blue light depending on it's settings.
>The glasses however are physical hardware on your side of the monitor so they'll always uniformly cut out blue light at whatever factor they're designed for, regardless of software and monitor design.
I knew it
software <<<<<< hardware