The dictionaries of Finder 9.1.1 and Finder 10.0 are similar at first glance, but on closer inspection there are many omissions and new features in Finder 10.0, some reflecting differences in the underlying operating system and others the fruit of an ongoing effort to simplify and rationalize the Finder's dictionary.
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The following properties are gone from the Application class: Largest Free Block, File Sharing, Sharing Starting Up, About This Computer, and Execution State. I believe some of these will reappear in other places. These new properties are added: Startup Disk, Trash, and Home. Only Home offers new functionality, reflecting the multiuser nature of the operating system.