It seems that the installer on the Mac App Store is still OS X 10.9.3

Question

I downloaded the full installer app from the Mac App Store today.
The version written on the Information Column is 10.9.4.
However, I checked the md5 of the InstallESD.dmg only to find that it is the same as OS X 10.9.3's InstallESD.dmg.
Hence, it seems that the full installer app on the MAS now is still OS X 10.9.3.
Is there anyone who encountered the same problem?
Here is the screenshot of the md5.

Answer 1

Does the InstallESD.dmg contain everything that gets installed? I thought there were other packages that were external to the installESD?
Do you need to compare every file?
FileMerge in the developer tools does this visually.
Or use find with md5…
find "/Applications/Install OS X Mavericks.app" -type f -exec md5 {} \;
# big list of md5's...
You could just compare packages.
find "/Applications/Install OS X Mavericks.app" -type f -name *.mpkg -exec md5 {} \;
I suspect the installer also downloads updates, but it's not clear if this is automated or if it is only done in software update after the install, it seems like the latter.
Also bear in mind lots of caching goes on with massive distribution systems like the App Store updates, you may want to give it a few hours (or days) to allow caches to be fully renewed, or try another network connection if possible, some ISP's can try to be aggressive about DNS or other caching.