Great series of tests. I own Vargo Jet-Ti and Brunton Flex upright stoves(like a Primus Crux only better, and made for Brunton by Primus). I use these with the pots listed below. I've found the Brunton Flex, with its wider flame ring, heats a bit faster and more evenly than the Jet-Ti.
I own two 1.5 liter pots. One is an older, plain, Teflon coated aluminum 1.5 L. pot by Traveling Light, makers of the Outback Oven (cloth fiberglass yurt-sheped pot cover).
The other pot is JetBoil's 1.5 L. pot W/ the "Flux Ring" heat exchanger and neoprene cozy. I find the JB pot does boil water faster than the regular pot but evidently from your tests not enough faster to save significantly on fuel on a week long summer trip to offset the weight difference between the two pots. However, it does melt snow enough faster in winter, saving fuel there. I'll continue to use the JB 1.5 L. pot for winter. For summer I've switched to the Travelling Light set's smaller 1 L. pot and homemade pie pan lid for weight savings. It still is a wide, low pot compared to many other 1 L. pots, which makes it more efficient.
With all my stoves, liquid fuel, canister or ESBIT, I use an MSR heavy foil windscreen. With my two upright canister stoves I must prop it up on small stones for better flame protection and it helps keep the canister cool as well.
Perhaps someone will find a way to make an aluminum pot & aluminum finned heat exchanger ring with the finned ring reinforced by an inner and outer wire laser welded to the fins, something like Primus does W/ their flat reinforcing ring. Steel heat exchanger fins, for reasons of weight, ain't the answer.
BTW, I also use the Outback Oven pot cover to melt snow faster in the JB pot. But in winter I'm using an MSR Dragonfly liquid fuel stove, a real "jet engine" of a stove yet with an amazing simmer capability.