Talking about the use and efficiency.IPhone 6s smaller and lighter than Samsung s7.
The specification of Galaxy S7
-Octa-core 2300 MHz, 64-bit
-ARM Mali-T8800MP14
-RAM 4 GB
The specification of iPhone 6s
-Dual-core 1840 MHz, 64-bit
-PowerVR GT7600
-RAM 2 GB
Although the specification of Samsung s7 is better than the iPhone 6s.But compared Samsung brand and this version.Is faster than older just 30%.Which is considered as the change that a little more.So from the past experience of the platform. The iPhone has proved that it is reliable in practice than Samsung.