DIFFERENCE BETWEEN BBXW3-BBXW4?

[rockfshr]

What is the difference capabilities Etc between these components?

 

[Johnny Electron]

BBWX3 can work with NN3D, the BBWX4 can not.
BBWX3 is no longer sold, the BBWX4 is the current model.
Both have the same subscription options from Sirius, currently.