IPhone 6 or the iPhone 6 Plus?

I'm planning on getting an iPhone but don't know want to get. I know the they have nearly the same spec excluding the battery, camera, and screen size. I'm not really on a budget but I can't decide.

Here's an idea, get the one that has the most memory in the Plus, wait 5 days and if you don't like it, take it back and get the smaller version with the most memory that one has.