Man you have no clue what your talking about.First everyone lecenses the arm designs and then you have choices to make them the way you want and you can mix and change things the way you want to fit your power envelope and your fab capabilities.the arm15 can be configured a few ways and can have up to 15 stage integer / 17-25 stage floating point pipeline so a true a15 can have 17-25 stage long pipe line depending on how much performance and power draw you want.
the a6 is based off of a15 but not a true a15 core and shares many features with it and its crazy that you compared it to a exynos 4 that is a true a9 setup,why don't you go back and see how bad the exynos 4 beat the crap out of every hybrid a9 setup that was done,it rocked anything from apple and QUALCOMM and the same thing is happening now,they used a hybrid a15 and Samsung is using the best design and the higher performing one vs the hybrids to save power or not having the fabs that could pull it off.I think its funny how the cpu from the gs2 is still competing with the a6,you do know all they did was add 2 more cores and upped the clocks and threw it in the gs3 and note 2 right?so a design done by arm and the one Samsung used from 2 years ago is still competing today
the exynos 5 will be king until cortex comes out with there next design and people start hybrids again and then Samsung will use true nextgen cores and pull ahead again.The a7 cores in the exynos 5 are brand new cores and are made for the a15 soc,they are not using an old design and using arms(you know the people that build the chips in the first places)purebred design.
now back to your stupid battery test,if you play music for 2 hours with you screen off it will up your usage time,do you not get that?your usage time is anytime the phone is not sleeping,its not the same as the on screen time that we are talking about.
btw im at 5:10 on screen time now and over 20 hours and just hit 10%,I might break 6 hours on this run and might match the 6.5 that was done in the review I posted.