Doesn't really make a difference which the fastest is, when you get to that level you won't notice the difference. Still the swiss ceramics&ceramic labrinths are the ones that i've been told are the fastest. But i run regular swiss and they are brilliant.
Basically once you get past bones swiss the difference is mostly strength, cooling and durability.
Ceramic bearings can withstand higher temperatures, so they wear so much less.
6Balls have larger internal parts but the same cage so they're stronger but still wear around the same amount.
Labs have a more closed cage so less dirt gets in/a whole lot less wear.
At the end of the day regular swiss suffice(why i ride them) you just have to make sure you keep them clean/lubed.