A comparison With 7.1mm thickness, the iPhone 6s sports a slim look and has a smooth aluminum build, which is sure to catch the attention. However, Samsung Galaxy S6 is slimmer with 6.8mm thickness. Sporting a glass back and metal frame, this is also equally attractive. While iPhone 6s boasts of 4.7-inch 1334 x 750 IPS LCD display with 326 pixels in every inch, Galaxy S6 offers 5.1-inch 1440 x 2560 screen with 577 pixels in every inch. Though Galaxy S6 offers a better and much brighter display compared to iPhone 6s, users may experience battery issues for the display. Apple iPhone 6s, which offers a sufficiently bright display saves battery life to some great extent. Verdict When it comes to performance, iPhone 6s is quite slick compared to Galaxy S6. It comes with Apple A9 processor that makes the CPU 70 percent faster than the previous model. Powered with octa-core Exynos 7420 processor, Galaxy S6 has eight cores. Four runs at 2.2GHz and other four at 1.5 GHz. Samsung is also better in terms of camera as it has a rear camera of 16 MP, compared to iPhone 6s, which has 12 MP camera at the back. Both the phones have some pros and some cons, yet they are worth the money.