Well no **** sherlock! I just do not think it is enough of a difference that it is a major factor in choosing between these two saws. They run close enough that everything else is a more important.
The total productivity in my day is not noticeably influenced by which of the two saws I use, so I think that the stop watch times cuts is a moot point if that is the only time you really notice the difference.
I am very serious though, if you want to run mine side by side shoot me a pm, always happy to show the toys off.
I can see your point... Another take on it is that things like fuel and oil capacity and consumption, ease of refuelling/oiling, saw weight's influence on fatigue, relative amount of vibration and influence on fatigue, balance (affected by B&C length) and influence on fatigue, ease of changing and adjusting chains, design considerations that affect air filter clogging, ease of clearing air filter... Lots of variables that can influence productivity over the course of a day/week/year. How to measure all of that would be a challenge... Timing cuts of donuts is the easy thing to measure but it doesn't tell the whole story of productivity (which probably doesn't really matter for any but the full time professional feller).
Me, through experience I know when I'm better off with my 461 in my hands rather than my 271 and vice versa... To me having both saws helps me be more productive.