Samsung Galaxy S6 is a beast . It has 2k display a mannamoth 8 core processor ( exynos 7420 octa) and an amazing design
Screen : - It has 5.1inch super ambled quad hd display with resolution of 2560* 1440p with pixel density above 500
Performance : - performance of s6 is superb the transmission , animations are fluid and there is rarely a frame drop. The new touch wiz is quite fast and fluid . overall performance is top notch
Camera : - It has 16mp camera with f stop 1.9 . It takes great low light picture but camera is biased in increasing the exposure which makes picture lool artificial
Build quality: - s6 is a well build phone . It has metal railing and front and back has corning gorrila glass 4 . phone is quite slippery though
Battery : - The battery of s6 is quite good but not excellent .it charges quite fast with upto 50% in 35-38 mins
Overall it is a good phone definately beter than s5 if you like samsung and touch wiz definately go for it