Well, please don't flame!
There is a difference and I believe you. The explanation is also very simple.
It has nothing to do with materials because at that thickness the resistance won't make any difference from a 22 gauge wire.
But it has everything to do with attys.
I have 901 attys from different sources and they are very different.
The ones from theelectroniccigarette run the coolest and i use them at 5.5V at home for a massive vape (a wall adapter with 5.5V and 1A).
The ones from ebay work at 4.2V, at 5.5V I lost 2 of them in an instant. These I use with a 3xNiMH Nicobox but at 4.2V they still get so hot after 4 vapes that I can't touch them. (yes, Ni-MH range from 1.44V fully charged to 1.18V when vaping stops) Still these produce the largest amount of vape
So there is a difference and that's because of atty quality.
Bottomline is you should cherish the GG and the attys that match it! It's a great product.
Second: everyone with it's own throat
PS: a RN4081 atty at 4.5V-5V can kick a 6V 901's dorsal

it will make you think you're puffin on chilli's
But then again I can bring a RN4081 atty to glow using only a regular lithium battery so we are talking apple and carrots here.