I realise this is an old post but if anyone is looking for something like this then I have developed a software tool that will perform schema comparisons between two databases and it is available for free as a beta release.

You can download SQLC here http://sqlc.azurewebsites.net/[/url]

I am still actively developing this tool as a beta release so if you find any bugs then let me know and I will fix them as soon as possible.