I found that the GS tank with rebuilt coils has the best flavour and vapour.. of all the GS-air tanks..

I have them all. Now the GS-MS is the same height as the GS tank, the air-flow is a lot better on the tank..Do not know if the diameter makes any difference.
Since I got the GS-tanks all 4 of them..

My gennies the Line and NextGen are pouting from the sidelines.. I find the tanks that good, with my rebuilt coils that is..
I ordered 3 from Fasttech, that were originals (I think) because the security sticker was there but the number was ripped off on all of them.
I also ordered 1 locally and it matched up with the ones from Fasttech.
$11.93 Authentic Eleaf GS-Tank Bottom Coil Clearomizer - 3ml / 0.15ohm / stainless steel + glass at FastTech - Worldwide Free Shipping