Both the hot-selling iPhones are 5.44 inches tall and 2.64 inches wide. There is a minute difference between their weight as iPhone 6 weighs 129 grams (4.55 ounces), whereas the iPhone 6s weighs 143 grams (5.04 ounces). Comparing both the models based on their screen size, there is a negligible difference of 0.1 inches between them as iPhone 6 screen size is 5.44 x 2.64 x 0.28 inches, and iPhone 6s is designed with
5.44 x 2.64 x 0.27 inches.
2 Display, OS, and other aspects
Both the models feature the 4.7 inches display. The iPhone 6 is installed with iOS 12 with an A8 chip, M9 motion coprocessor; however, iPhone 6s is featured with iOS 13, including an A9 chip, M9 motion coprocessor. Apple provides its customers with 1GB RAM if they go for iPhone 6, while if you buy 6s model, it is equipped with of 2GB RAM.
Currently, if you are looking to buy an iPhone 6 (16GB), you gen get it for $160, while you need to spend $210 if you want to purchase iPhone 6s (16GB), model.
4 Sales Difference
iPhone 6s is proven out to be a bit disappointing for Apple as compared to all other previous models. Because of the very little difference between both the models, iPhone 6s sales experienced a slight dip after its launch after the hot-selling model iPhone6.