Difference in rear panels

[Ppd1979]

Looking to find out the differences in a 1928/29 2 door sedan rear panel/window and a 1930/31 2 door sedan rear panel/window.

 

[verdirick]

Belt moulding on the 28/29 is wider than the 30/31

 

[Oldbluoval]

And profile of the reveals is different

 

[Ppd1979]

Thank you