Google - I am going to buy a phone and I am confused which one to buy . the sony xperia z5 preimium?

I like better isI think it might be safer using the apple iPhone 6s this is a pretty popular phone from watching the many different providers who give specials check around and get the best price plan sometimes you can get smartphone free or for a low monthly cost that won't have you paying a large amount for it.The sony Xperia z5 premium is a good phone the apple iPhone s6.