I think the biggest tip in all these test is the grey Coleman canisters are not nearly as good as the MSR ones. Something I've noticed for years without actually putting a stop watch to them.
I thought the same thing but not according to this test. However....
The pressure seems to really drop in the Coleman canisters after a few uses. I've never noticed the MSR pressure dropping noticeably until it was almost empty (of course, taking out cold temperature issues). THAT could be why it seems the Coleman doesn't seem as fast or hot. It could be the pressure drops and you actually have a smaller flame but you don't really notice that the flame is smaller.
Just a hunch.
But I would have bet the farm a Coleman just doesn't give the same performance of an MSR canister, and if the pressure drops as it approaches half empty, then I guess it doesn't.
