Just a brief rundown of what's actually on the Sony discs. 

VS. King Ghidorah-New 1.85:1 Tristar master. New video generated opening credits that resemble the old Tristar ones. Features a typo ("Kopichi Kawakita") not seen in the original credits. Opening title screen is the same as the old Tristar master. End credits of any kind are still missing, and the usual scroll of copyright info from the old master is still present. Features a new subtitle track. The scene in which the story of the dinosaur on Lagos Island is first recounted was viewed by Norman England who described the subtitles as accurate but overwritten. 

VS. Mothra (Godzilla and Mothra:Battle for Earth)-1.85:1 Tristar master previously seen on cable/Netflix/Crackle. Toho logo was re-added. Opening titles are different as well as positioned different than on the original Tristar master, but still uses the "Battle for Earth" home video title. End credits are still missing, and the Tristar copyright info is still seen, but for some reason the video continues to go on for the movies original running time with a black screen, and no music. Features a new subtitle track that is said to be fairly accurate. 

VS. MechaGodzilla (VS. MG II)-New (?) Tristar credits, also featuring another new typo, "Ryoka Sato". End credits are new and uncut, and while they aren't the original international credits, they're done in a similar style/font as the ones for some of the Millennium films. Unfortunately, it sounds like this release includes the same dubtitles as seen on the previous DVD release, though this is yet to be 100% confirmed. 

VS. SpaceGodzilla-International version with uncut opening and ending credits, as previously seen on cable and Crackle. Features a new subtitle track. Accuracy of subs is currently unknown 

VS. Destoroyah- The same as SPACEG; uncut international version previously seen on cable and Crackle with complete end credits. Also features a new subtitle track, though accuracy is also unknown.

VS. Megaguirus-New English Godzilla font is used for the international title screen. Seems to feature the same dubtitles seen on the DVD release, though the "butthole" line has apparently been changed.