One plus 6 and samsung galaxy S8

One plus 6 and samsung galaxy S8 One plus 6 and samsung galaxy S8 Both these phones have similar price. But which one should one should buy. If you want to buy a second hand mobile go far S8. These days every few months the power of the processor increases dramatically. Buying a product that was released 1 year back it worse then buying a second hand mobile. Second hand S8 would come much...