[Xperia Z General] Tungstwenty:
Changes in 10.4.1.B.0.109

Comparison of Movistar Spain .109 (1271-2566) against Generic Ukraine .101 (1270-1397) shows that the differences are indeed carrier-specific stuff.

The reason for the increment could be a tiny difference on the core code of the (stock) Timer small app, perhaps.

System Apps (/system/app)

Missing com.codand.playfon - PlayNow™ Store

Missing com.sonyericsson.androidapp.torchapp

Added com.sonyericsson.customization.presetcontacts - adds predefined contacts on the first boot (see overlays below)

Missing com.google.android.tts - Google Text-to-speech Engine

Added com.google.android.music - Google Play Music

Added com.sonymobile.runtimeskinning.operatortelefonicatheme - Movistar wallpaper and lockscreen background

Added com.sonyericsson.rcsextension, com.sonyericsson.im, com.sonyericsson.rcs.richcall, com.orangelabs.rcs - "joyn" chat / IM / send files and media / video call

Small layout and title change in the Timer small app

Twitter for Xperia™ 3.0.5 instead of 3.0.3

Missing com.android.voicedialer - Voice Dialer

Bundled apps, installed as user (from /system/etc/customization/applications)

com.adobe.reader

com.dhr.spotify.launcher

com.eamobile.nfsshift

com.gameloft.android.gloftcity

com.herocraft.game.birdsonwire.telefonica

com.mobisystems.fileman

com.movistar.android.mimovistar.es

com.movistar.recomienda

com.sonyericsson.androidapp.emocion

com.sony.tvsideview.phone

com.tuenti.messenger

(does not include com.evernote that came with Generic Ukraine)

and from /system/etc/product/applications

com.mobisystems.office - OfficeSuite trial

com.sonymobile.startpsm - Let's start PSM

com.sony.snei.vu - Video Unlimited

com.sonyericsson.trackid - TrackID™

org.microemu.android.se.appello.lp.WisepilotSE - Wisepilot for XPERIA™

Overlays (/vendor/overlay)

android-res: Movistar APNs

com.android.browser-res: Movistar and other spanish bookmarks

com.android.email-res: Movistar POP server settings

com.android.internal-res: Activate default APN

com.android.phone-res: Display data icon; other network connection settings

com.android.providers.partnerbookmarks-res: Bookmarks, again

com.android.settings-res: Configure and enable editing tethering APN

com.android.systemui-res: Configure default quick toggles

com.mobisystems.editor.office_with_reg-res: Activate free trial

com.sonyericsson.android.camera-res: Disable sending MMS

com.sonyericsson.capabilities-res: Set customer id

com.sonyericsson.conversations-res: no delivery reports; other MMS settings

com.sonyericsson.customization.presetcontacts-res: Some customer service contact numbers

com.sonyericsson.customizedsettings-res: tethering settings

com.sonyericsson.home-res: launcher default shortcuts and widgets

com.sonyericsson.initialbootsetup-res: ES as default language

com.sonyericsson.r2r.client-res: worldwide APNs

com.sonyericsson.setupwizard-res: settings during setup wizard (e.g. internet connection)

com.sonyericsson.shutdownanim-res: movistar shutdown animation

com.sonyericsson.simcontacts-res: enable using sim contacts

com.sonyericsson.textinput.uxp-res: default settings for keyboard

com.sonyericsson.thememanager-res: set movistar wallpaper

com.sonyericsson.trackid-res: set customer id

com.sonyericsson.tvlauncher-res: default shortcuts

com.sonyericsson.updatecenter-res: settings for which connection types to use for updates

com.sonyericsson.wappush-res: activate wap push

com.android.phone.product-res: 4G icon and text (instead of LTE)

com.android.settings.product-res: "4G" instead of LTE; "2G" instead of GSM

com.sonyericsson.extras.liveware.product-res: enable warnings about open flaps (water resistance)

com.android.systemui.product-res: small 4G overlay icon

Binaries (bin, libs, vendor libs)

changes in scd and scdnotifier (secure clock)

some libraries related with media and drm are different

Media (/system/media)

Movistar ringtone and boot animation