LOL, that's not a choice. Those two are completely different things. It's akin to asking people if they want to buy eggs or pencils.
One is a computer, the other is a phone. In a vacuum where I don't have any existing device (PCs nor phones), I would prioritize getting a phone as many aspects in life do require a functional phone, and many PC tasks can now be done on a modern smartphone. So my vote is for the iphone.