Great info there, thanks!
While it's cool to see a movie from 1930 in widescreen, IMO the 35mm version of this is the better of the two by quite a distance. The performances and the compositions within the frame are far better handled. I don't think they knew what to do with all that space...
I think a list of all large format productions can be found at
http://www.in70mm.com/
It's an exhaustive site listing every production and release format (including blow-ups) and also a year by year guide. Great articles, too!
Could be a help