Wow, that’s a long post and I’m not sure where your going with it. Have you actually tried the cells you are comparing rather than the graphs? HKJ does some awesome work but try to compare the Sanyo and Panasonic in a light with cut-off yourself.
Over 4 cells I get around an extra hour out of Panasonics rather than Sanyos and that’s gunning on high the whole night, swapping the cell out every time the touch hits cutoff. Both lights dim and the extra lumens the Sanyos may produce in the middle aren’t noticeable 
Edit; my test on the XinTD gives runtime tests with the two cells for example Review: XinTD C8 (SC-82)