First of all, Razer Lycosa is a membrane keyboard. Totally different league than a Filco.
Main reason Filco is the reference keyboard on here is because it stood the test of time, where it has high reliability, nice aesthetics, and quality internals, all for a decent price. Other boards like Deck or Das are solid boards too, but their aesthetics and price is a turnoff (especially for Deck). Recently, now there are many Chinese, Taiwanese, and Korean keyboards (excluding customs) that emerge that drive prices down, namely Leopold, Ducky, or CoolerMaster. Overall, they're good keyboards, but have not been around as long and quality has not surpassed Filco yet to be the new standard.