Okkkk... i had the chance to use almost every new smartphone on the market from rhe new nexus 6,htc m9,iphone plus,note 4,note edge, and now the s6....
I decided to stay with the s6 even though i like the note 4 size but there is no lag woth the s6. Touch wiz is a million times smoother. The camera is the dame as the note 4 except it snaps pictures twice as fast. The note 4 had some lag hete and there i jave yet to have any type of lag with the s6 probably because of the new exynos chip samsung is using instead of snap dragon. But the note 4 just doesnt compete as far as the software end goes. The s6 is truly a better phone from the screen to the speed to the quality. I dont care about removeable batteries as almost all phones will soon not have that option anymore as every new flagship phone ive tried all had non removeable batteries. The sd card slot bugged me at first but now i could care less as theres so many ways to get pictures and music with out using a card i dont care. You cant go wrong with either and i bet the note 5 will have a non removeable battery who knows abojt an sd slot. Samsung is following apple. But if you want a faster phone less bloat ware quicker camera better screen,better sound quality,better call quality, go with the s6 if you want a bigger screen go with the note 4. S6 is by far the better phone but if its size u still cant go wrong wjth the note 4. I lile the note edge better but thats my opinion.