Given the newly announced iPhone 6 screen sizes:
iPhone 6: 1334h * 750w @2x (in points: 667h * 375w)
iPhone 6+: 1920 * 1080 @3x (in points: 640h * 360w)
An interesting thing to remember when reading screen sizes on my iPhone 6 Plus was that when you have it set to "Zoomed" mode it will show up as a the iPhone 6 height (667) and when you have it set to "Standard" it will show up as (736). Shouldn't really matter, but if you specifically wanted to know the device type for some reason ( Maybe Reporting ), this could fool you.
See this.