TBH.. I don't even know what all that means.
Basically, D2D encrypts the EXE, without leaving hooks for the NVSE/FOSE/OBSE team to add scripts to the exe. What this means is that there's no chance of NVSE/FOSE/OBSE in D2D versions of the game.
Think of it like a castle. Steam has a drawbridge that they can lower for legitimate business. D2D just has walls. FOSE/NVSE/OBSE requires a drawbridge, because breaking down the walls is illegal.
This is important because the **SE family of extenders adds plenty of options to the game when it comes to modding. FOSE allowed for ridable deathclaws and changable ammunition before Obsidian hardcoded ammo changing into the exe. It allowed for PA to take damage on the fly, becoming unusable or even exploding if hit too much. It allowed for additional hotkeys, and it allowed modders to streamline scripts; with the commands that FOSE adds, an effect that would take multiple scripts to track can be done by a single line.
**SE is an incredible resource for anyone who uses mods, as it allows mods with very interesting effects compared to vanilla. Steam works with NVSE, FOSE, and OBSE. D2D does not.
Advantage: Steam.
All I know is steam is allways in my face now and wanting to snoop my computer for other games and ... I JUST WANTED TO PLAY FALLOUT! It just seems like I was forced to download spyware to be able to play a game I like.. and that's not cool and I'm pretty sure that's what allot of people are upset about.
You have to opt
in to the computer survey. That's the only time it "spies" on you, to the best of my knowledge, though it's hard to call it "spying" when you've got to opt into it.
If you don't like steam running when you turn on the computer, you can turn that off in the options menu. Don't like it giving you advertisemants for other games? (Steam sales are generally highly lucrative though.) Head to the options menu and turn that off.