Tested it.
Think of it like a Sensei but without the minor acceleration issues, driver and all the other fancy stuff.

For being only RM220 (where the Sensei Raw is also near the same price non-MSRP), if I'd want absolute performance alone I'd go with the FK. Simply because it is simple, no frills, no bs. You plug, you play, you pwn (or be pwned).

The only minor personal issue I have with the FK is the DPI settings. The second DPI setting, being fixed at 1150 is a little bit odd. It's in the middle of no where basically, I'd want this at 1300 instead.
This is an issue because then every single game I go into, I'll have to reconfigure the mouse sensitivity using in-game controls or use a third-party app — which defeats the purpose of having a driverless mouse.

So yeah... the FK is a great mouse overall, with minor gripes on DPI settings. Oh and if it comes with a different color scheme too, it'd be nice.