What is the difference between Android 4.4W (API20) and Android L (API20, L Preview) in the SDK Manager?

Question

I'm updating my SDK Manager in Eclipse, and there are two new downloads:

Android L (API20, L Preview)

Android 4.4W (API20)

I'm confused because they're both referred to as "API 20". And I'm not sure what the "W" in "4.4W" is referring to.

Solution 1

L Developer Preview is the preview of Android 5.0

Android 4.4W is Android Wear SDK

Solution 2

Android 4.4W Target Android Watches

See Image: http://i.stack.imgur.com/ztzXa.jpg

while Android L (API20, L Preview) is the preview of the upcoming release of Android. It is subject to change and it's stability is not guaranteed

Solution 3

Android Lollipop is API 21 , so this is possible to differentiate between them:

https://developer.android.com/about/versions/android-5.0.html

Android 4.4W is for Android Wear (mostly smart watches).