This is a list of dawnguard scripts that differ from those in the main source folder
Spoiler C03SacredFontScript.pscdunDustmansCairnLever.pscFXDwarvenSpiderSCRIPT.pscmagicImodBeginLoopEnd.pscMannequinActivatorSCRIPT.pscMineOreScript.pscNightMotherCoffinScript.pscPlayerVampireQuestScript.pscPlayerWerewolfChangeScript.pscPlayerWerewolfCureSconceScript.pscPRKF_VampireFeedBeds_000CF02C.pscQF_C03Rampage_000AEBFE.pscQF_DA04_0002D512.pscQF_DA16_000242AF.pscQF_TG05SP_0002C367.pscQF_TG05_00021551.pscQF_TG08_00021554.pscQF_VC01_0005C625.pscSF_DB09MaroAmbushScene_00064269.psc
These changed (i.e. the pex from dawnguard.bsa doesn't match the pex from the main bsa) scripts are missing:
Spoiler tg08bquestscript.pextif__0001c677.pextif__0002725e.pextif__00027260.pextif__000e7697.pexvampirequestscript.pexwealiasscript.pex
This could just mean that they have been built on a different machine, however, auto properties LastPower and LastLeftHandSpell are missing from vampire quest script for instance
Here's a list of source files that are missing from the update (i.e. pex exists in the bsa but sources were not provided)
Spoiler dlc1prisoneraliasscript.pscdunraldbtharpuzzlegearblockerscript.psctestphilhealerhealcheckeffectscript.psctg08bquestscript.psctif__0001c677.psctif__0002725e.psctif__00027260.psctif__000e7697.psctif__010043f5.psctopicinfoanimplay.pscvampirequestscript.pscwealiasscript.psc
Whether or not these are significant, I do not know...
Doesn't really mean much to me, I don't use the CK, but may be useful to someone here?