I think it's nice just the way it is

A little long for my taste, but overall it's pretty cool. I dig the shape and the clear section at the top actually fits it quite well and keeps it from looking too "busy"
What sizes do you need, De? I've got some extra batts in a couple sizes and even have a few of them already set aside to put up in a PIF treasure chest, but if they're what you need you're welcome to them
I think the biggest differences are build quality and materials used. Most of the cheap chinese rebuildables are chrome-plated brass or other softer metals, while the more expensive stuff is usually stainless steel.
In the end, the way they all vape depends on how you build them and how you use them. That's my

and YMMV, of course