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

Question

I am updating my SDK manager in Eclipse and there are two new downloads:

Android L (API20, L Preview)

Android 4.4W (API20)

I am confused because they are both called "API 20". And I'm not sure what “W” means in “4.4W”.

Answer 1

L Developer Preview is a preview of Android 5.0

Android 4.4W is the Android Wear SDK

Answer 2

Android 4.4W Target Android Watch

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

while Android L (API20, L Preview) is a preview of the upcoming version of Android. It is subject to change and stability is not guaranteed.

Answer 3

Android Lollipop is API 21, so you can distinguish between them:

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

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