I did some more technical comparisons of the German and French Blu-Rays. There are a number of odd differences between the versions.
The director's cut uses the exact same video track and the same DTS English track between the two but the AC3 tracks are different. The DD2.0 English track uses a higher bitrate on the German release (320kbps vs 192kbps) and the German version also has the running commentary and German dub in 320kbps AC3. There is no French dub for the director's cut and the French release omits the running commentary.
The international cut uses a much higher bitrate for the video on the German release than the French release. It's a higher bitrate than even the director's cut on either release, oddly enough, even though the director's cut gets it's own disc while the international cut is paired with the US version. The German release lacks the DTS English audio track and the French dub AC3 track that are on the French version but has the German dub. The English AC3 track is a higher bitrate on the German release, the same as the directors' cut.
The US version is the strangest one of all. Besides the fact that the video is from the same transfer used for the HD-DVD rather than the US Blu-Ray transfer used on the French release, it also uses different encoding. The director's cut and international versions both used AVC, but while the French version also uses AVC for the US version, the German release uses WVC1. The bitrate is higher than what was on the HD-DVD, though. The DTS track on the German release is DTS HD-MA while the French version uses standard DTS. The English AC3 track again uses a higher bitrate and there is a German dub.