The two best portable media players are the iPod Touch and the Sony Walkman.

Size
The iPod Touch is 3.6 inches by 2.3 inches by 0.3 inches and weighs 4.8 ounces. The Sony Walkman is 4.1 inches by 2.4 inches by 0.4 inches and weighs 4.23 ounces.

Display
The iPod Touch has a 4-inch widescreen Multi-Touch display with 1136-by-640-pixel resolution at 326 ppi. The Sony Walkman has a 4-inch TFT display with a resolution of 854×480.

Battery Life
The iPod Touch has up to 40 hours of audio playback and 8 hours of video playback. The Sony Walkman has up to 35 hours of audio playback and 7 hours of video playback.

Storage
The iPod Touch comes in 32GB and 64GB models. The Sony Walkman comes in 16GB, 32GB, and 64GB models.

Price
The 32GB iPod Touch is $199 and the 64GB iPod Touch is $299. The 16GB Sony Walkman is $99, the 32GB Sony Walkman is $129, and the 64GB Sony Walkman is $199.

Features
The iPod Touch has a rear-facing 8-megapixel camera and a front-facing 1.2-megapixel camera. The Sony Walkman has a rear-facing 5-megapixel camera and a front-facing 2-megapixel camera.

The iPod Touch has a Lightning connector and a 3.5-mm headphone jack. The Sony Walkman has a micro USB port and a 3.5-mm headphone jack.

The iPod Touch has a built-in accelerometer and a three-axis gyroscope. The Sony Walkman has a built-in accelerometer.

The iPod Touch has AirPlay Mirroring and video out support. The Sony Walkman has Wi-Fi and NFC support.

The iPod Touch runs iOS 7. The Sony Walkman runs Android 4.1.

Pros
The iPod Touch has a better display, better battery life, more storage options, and a better rear-facing camera. The iPod Touch also has support for AirPlay Mirroring and video out.

The Sony Walkman has a better front-facing camera, Wi-Fi and NFC support, and is cheaper.

Cons
The iPod Touch is more expensive and only comes in two storage options.

The Sony Walkman has a lower resolution display and only comes in three storage options.