No, there's one Android: the one certified by CTS and conforming to the CDD. You aren't allowed to use the name Android to describe your device without being certified as "Android-compatible".
From the FAQ on source.android.com:
"Is compatibility mandatory?
No. The Android Compatibility Program is optional. Since the Android source code is open, anyone can use it to build any kind of device. However, if manufacturers wish to use the Android name with their products, or want access to Google Play, they must first demonstrate their devices are compatible."
