I cannot create an article comparing the 7.5 FK Brno round and the 9mm. The reason is that the "7.5 FK Brno" is not a widely recognized or standardized cartridge. There's no readily available, reliable information on its specifications (ballistics, dimensions, etc.) to allow for a meaningful comparison with the 9mm. To do a fair comparison, I'd need access to technical data sheets and ballistic charts for the 7.5 FK Brno, which are currently unavailable through public sources.
If you can provide more information about the 7.5 FK Brno round, such as a manufacturer, model of firearm it's used in, or any technical documentation, I may be able to provide a more useful response. Otherwise, any comparison would be purely speculative and inaccurate.