I would go with the Zowie, Better optical sensor and switches for left and right click. Did you look at the FK1? I used to use the Zowie series but dipped my toes with razer and got the Deathadder elite RGB and I HATE IT. Only the drivers ruin this mouse... It's DRM for mice. I am forced to use the old drivers and use it on offline mode all the time.
Spectre: Does razer still have its drm in it's drivers and configuration program?
See if you can find out what sensors they use. Some mice have tracking issues like some of the laser sensors that jitter with low movement speeds.
Spectre: It's sad that there is only maybe 1 current trackball out there that works well for gaming with another couple that are fairly good.
It still does. What is interesting is the newer mice they make now have the ability to save the profiles to the mice now. something all the old ones never did. so it's like a one time use the driver and set up the mouse and then save the profile then delete the driver and boom you are good. that is why I strictly wanna only use Zowie and Steel series. Logitech is meh with there new stuff. they have very bad left and right click switches that do not last long.