We're working on migrating our database (~400 tables) from SQL 2008 R2 to SQL Azure. We're currently in the proof-of-concept stage, figuring out the process we'll be following. We have a process that we think is solid but I'd like to perform some validation diffs on both schema and data to confirm that we have a successful migration. I've never done this before with SQL Azure and am looking for a good tool to do this. I'd love if it's a free tool but we can pay for it if necessary. Ultimately, this is a one-time migration (we'll do it a few times but the real migration will only be done once).