When comes out, would you rather buy the 4.7-inch iPhone 6 or the 5.5 one?

The only difference between the 2 models is the screen size as far is I know, if not, can you tell me in what ways they will be different?

Yes, so far its only the size is the different. I'll be getting the 4.7"

So far, there's no information available about the differences, other than the size. I would buy the 4.7" iPhone, if I were to buy an iPhone, because 5.5" is too large for me. My current phone has a 5" screen and is around 5.4 inches tall. That's about the limit, and I think that if a phone has a 5.5" display, it will be about 6 inches long, which is too long for me.

I would actually go to an apple store and look at it. Its a trade off, the larger screen may be better depending upon what you want to do with it, but the size now is great for fitting in hand and pocket.