There are a few source code files that get compiled and linked into the version of mongod.exe for Windows that are included in the SCons build but not included in the Visual Studio project (db/db.vcxproj). buildinfo.cpp is expected, but the others may require review.

util/debug_util.cpp
client/distlock_test.cpp
db/driverHelpers.cpp
util/histogram.cpp
util/password.cpp
db/stats/service_stats.cpp
util/signal_handlers.cpp

I don't know which of these should be in both builds and which should be in neither build, but it seems like the builds should include the same code except where required by the build.