It offers more space between and it does keep heat down. I was sad they didn't have the shiny tips too. I'm seriously considering ordering the derringer clone off fasttech just for all the top caps you can get with it., then a brass and black mechanical to make it all match and be purty. I normally don't order from fasttech, but it's almost impossible to find what I want anywhere else.
$8.15 Derringer V2 Styled RDA Rebuildable Dripping Atomizer (V2, 22mm, Brass + SS) at m.FastTech.com - FastTech Mobile
$13.55 4Nine Styled Mechanical Mod - 18350/18500/18650 / brass / black paint at FastTech - Worldwide Free Shipping
I've heard those 4Nines can cause some problems... not sure of the exact details, but something about hybrid-this-that-or-the-other-thing.
But that's the ONLY reason I'll ever order from FT, if there's something I really NEED that I can't find anywhere in the US -- like the brass kick ring that took 43 days to reach me even though they shipped it the very next day.

So I'll keep looking for a black and brass/gold mod, somewhere in the US.
Andria