I like that it has a big thermal battery, it's wireless, and modular. I typically prefer diffusers over injectors, but 14mm injectors are pretty damn fun. And I use the Omega as both. Also its 18mm injector module works well as a diffuser over TM WPAs and similar tubes. Generally it works how I like, the ritual is fun and the flavor is easy to dial in. It's well designed and keeps the heat where it is supposed to be. It basically works with any bowl I throw at it, at any depth.
Of the other ball vapes you mentioned, I prefer the ZX to the screwball. I am not a fan of gem cuts in any ball vape. They are typically used to supercharge and overcome other problems in the housing design. As they overlap, it will add a small amount of restriction and hot spotting. This is really apparent with the old Screwball bowls, but the new shallower ones work much better.
The ZX is well designed and is built perfectly for its purpose. I happen to like the SX a little bit more, but reasonable people disagree.