Thanks for the reply Gareth, I didn't think they were quite identical - specifically, there are some publish menus that don't seem to be there.
I know that we ran into some issues with our MathFlow equation editor that was expecting certain.
Having said that, I will investigate a bit further ... perhaps I will need to log a feature request requesting that there be a way to configre what the default open method is for the windows file association.
Thanks,
Rob