I know I am posting quite often about DizzyDiff but I added ID3v1 support to this version so I think that it should be published. DizzyDiff will now by default search inside the ID3 tags (only version 1 is supported currently) of MP3 files as well. There are also some other minor changes.
I tried to include the LuaJIT with this version but I cannot find the Windows binaries. The next version will hopefully include them along with support for ID3 tags version 2. If you happen to have the Windows binaries for LuaJIT then please email them to me.
You can download DizzyDiff by clicking here.