Doing a file comparison of the install folders and getting lots of matches doesn't mean they are close. The 1.34 disk patch was only 10MB, so by that same method the patched disk version is close to the unpatched disk version, as well.
I mean that both Steam/GoG game releases contain the same files (global.cmp/treasure.cmp, region.00n files, dlg and startup folders and few main files) as in 1.0029A unpatched disk version of the game. I saw your md5 file from Steam release and has verified manually with the disk version of game. In official game patches 1.33/1.34 all these files have been updated, but not in GoG and Steam releases.