I'm gonna start off by saying that my opinion here isn't really a very educated one, since I'm quite new to vaping and haven't tried too many things, but here goes.
The Zeus X Mesh is amazing, but only if you go the extra mile and use OFRF NexMesh strips. With the stock mesh strips, it always lacked something. Don't get me wrong, when it worked, it was great and then I didn't know what I was missing, but I went NexMesh and haven't looked back. You can do one of two things to use NexMesh strips instead of the Geekvape ones. First is to modify the build deck by using a Dremel or a file to remove the mesh guides from the base. Pretty easy and straightforward, but some people might be afraid of messing their tank up or aren't handy with tools. For these people, method 2 will work just fine. Take a NexMesh strip and use a nail clipper to ever so slightly trim the corners. Like, remove a square of the mesh's lattice from each corner carefully and then use the strip like you would the GV ones and you're 95% of the way there. Right now, the Zeus X Mesh is probably my favorite tank out of those I've tried, which admittedly aren't a lot.
Having said that, I had borrowed a Profile Unity from a friend for a while. I hate how it looks, but man does it vape nicely. Quite different from the Zeus X, though. I found the Unity to always be a cool vape, even after cranking the wattage. Zeus X Mesh is on the cooler side too, but not as much as the Unity. Between the Unity and a Zeus X Mesh with OFRF strips, I prefer the Zeus, if I'm honest. Flavor with some juices was better with the Profile, but mostly I preferred the Zeus. Right now, I also have a Dovpo Blotto and a Steam Crave Aromamizer Supreme V3 on order. The Aromamizer should be here within the week and I got the advanced kit which includes the mesh deck, so I'll give that a shot and report back. I can't see it being that great with mesh, though, as it's primarily built for regular coils. I hope I'm proven wrong. Both the Blotto and Aromamizer are supposed to be top notch, so I might be in for a treat. Sad part is the Blotto is on the slow train from China, so it'll be a while before I get to try it. Lastly, I'd also like to try the Kylin M, it's supposed to be great and, unlike the Unity, it actually is presentable.
I also got myself a Hellvape Dead Rabbit V2. Don't get one. Just don't.