I dunno why i never googled it myself when i got lost in all the hype of "all brass" mods. I guess the only reason there was a hype was because most other mods that got a brass version were initally released in stainless steel (ie sigelei 19). So i can see why one would opt for the brass for better conductivity in that case, and may sacrifice the extra durability that stainless has. But in this case of the sentinel, it seems like people opting for the brass are going more for durability than conduction. So clearly all the claims that the brass v3 will "hit harder" than the two-tone, and i have seen a few such statements, are unjustified. As ethebull showed, and i followed up, aluminum is listed as having 61% conductivity of copper and brass is only 28% as conductive as copper. However the two tone and brass have the same contact points and the middle section is identical brass as well. So what would be the added is the two extension tubes and the 510 connector that will be better conductors than their respective parts on the brass model, and this may amount to almost no difference in noticeable vape quality.
Essentially the brass is more durable, yes, but it can in no way be a better vape than the two-tone (unless the materials are different than listed on the site), it can only perform noticeably just as good or worse. And i have my agi on it and its not coming off anytime soon, 5 different gennys for 5 differnt mechs, so threads will be spared for a while.
wish a had a brass v3 to do a side by side. But will do one when i get my all brass tvs clone