Lion 11E29 vs. 11E53 on InstallESD

I downloaded a new Install Mac OS X Lion.app through the Mac App Store this morning. Depending on where I look in InstallESD, I see two different build numbers:

11E53 from /Mac OS X Install ESD/System/Library/CoreServices/SystemVersion.plist
11E29 from /Mac OS X Install ESD/Install Mac OS X Lion.app/Contents/Info.plist

The resulting system (after appling packages, including MacOSXUpd10.7.4Supp) is 11XXX. My questions are:

1. What’s the difference between the two files (/S/L/CoreServices/SystemVersion.plist) and (Install…/Contents/Info.plist)? SystemVersion.plist here seems like it may refer to the Installer volume itself, and Info.plist to Install Mac OS X Lion.app. I’m confused.

2. What’s the difference between 11E29 and 11E53, if it matters.

Thanks much,
Aaron