3 Key Differences Between the iPhone 6 and the iPhone 6 Plus

— -- First comes the excitement about a new iPhone and then the indecision.

How is an Apple fanatic supposed to choose between the iPhone 6 and the iPhone 6 Plus?

Both devices will be available in stores on Friday. Apple CEO Tim Cook called them the best iPhones Apple has ever produced.

Here's a quick cheat sheet on the features of the iPhone 6 and the iPhone 6 Plus, including how they differ.

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Screen Size

The most obvious physical difference between previous iPhones and the latest devices is the screen size. The iPhone 5S screen was 4 inches.

The iPhone 6 is 4.7 inches, while the iPhone 6 Plus measures 5.5 inches diagonally -- giving Samsung, which has dominated the giant phone market, some competition.

Price

The iPhone 6 starts at $199 for a 16 GB configuration, $299 for 64 GB and $399 for a whopping 128 GB configuration, with a two-year contract.

The iPhone 6 Plus starts at $299 (16 GB), $399 (64 GB) and $499 (128 GB). Both phones come in three colors: gold, silver and space gray.

Battery Life

While both phones meet or exceed the battery life of previous iPhones in all metrics, there is a clear winner.

The iPhone 6 has up to 14 hours of talk time on 3G, while the iPhone 6 Plus boasts up to 24 hours, according to information posted on Apple's website.

When it comes to surfing the Internet on Wi-Fi through the devices, the iPhone 6 has up to 11 hours while the iPhone 6 Plus can handle an additional hour.

The iPhone 6 has up to 11 hours of video playback, while the iPhone 6 Plus has up to 14 hours. You get the idea.