The most important component of premium cymbals is B20 bronze. All these companies use it. Sometimes in clear for sometimes they add some other components so they can make a magic sauce like Paiste and Zildjian.
Find out more about cymbal materials here.
I already mention that pitch can differentiate as well as the versatility. Some series like Zildjian A custom are very versatile while series like Paiste Rude has only one purpose.
The main difference is in character and the sound. From Paiste 2002 which has that old school sound, over Rude which has a deep sound with a strong attack up to AAX totally modern cymbal with a bright sound and not too much “in your face”.
You see every cymbal from the list has its own sound character.
Regarding the series level, Paiste 2002 is the top-level with Paiste same goes for Meinl Byzance while Zildjian and Sabian have higher series than these.
Paiste and Meinl cymbals are more expensive due to that fact but in comparison to two other companies they do not offer a better sound but totally different, not worse either.
Also, they do not offer a better quality in a matter a fact I have a better experience in the durability with Zildjian and Sabian cymbals.