Thank you for your reply. What kind of support can we get by using SDK X or XI? Will there be additional fees charged on those support?
Our client likes the pdf comparison format from Acrobat 8 better because they have been using that format for a long time for their pdf comparisons. With that said, it is not a requirement set in stone with the client, just highly preferrable. Another reason I mentioned SDK 8 is because I read in other message threads on this forum that the comparison api exposed to developers are from Acrobat 8, pdf comparison api from later versions, 9, X and XI are not released to public.
https://forums.adobe.com/message/2335879#2335879
https://forums.adobe.com/message/2670981#2670981
Furthermore, our client is part of the federal government, this application is for their internal use on their pdf files, but the result of the comparison is released to public as public data (not sure, need to verify with client if there's a subscription fee). Does anyone know if there could potentially be a licensing problem if we develop a plugin-in with Acrobat SDK 8 or X or XI to batch compare thousands of pdf files every few months for the client? The client bought and paid for licenses on Acrobat 8, 9, X and XI.