Someone else wrote this up, but it is an upgrade patch with the following:

The Microsoft Store version features a first person mode with an FOV option and icons for lantern/sneaking, an Infinite Ammo Mode, Low/Medium options for camera bob, as well as increased stamina, allowing to run for 5 seconds at default stamina (instead of 3 seconds).

Thank you. If the game has a camera bob that can't be adjusted, I'll definitely miss the option to tone it down. Everything else I can live without (though the lack of update parity irks me on principle).

I wonder if they're pissed that GOG said the Quake update was "coming soon" when it clearly wasn't. Maybe that's unrealistically petty though? shrug

Yeah it sucks that so many devs and pubs don't give a crap about GOG's small marketshare/us, even though we're paying customers; they're free to stomp on us like bugs. I wonder if this is the main issue - 2nd class citizenship - that could drive GOG out of business.

List should be fully updated again.

To add to this, the build on GoG has some issues versus Steam, from what I've noticed some HUD elements are missing (no floor curses, missing mini-boss names, key mappings missing) while they are present in the base game on Steam version.

EDIT: Also, Afterbirth and other DLCs seem to require an internet check to timeanddate.com as per this post while this connection check is not present in the Steam builds. Failing to connect crashes the game upon launch, at least on Wine. This might actually be related to faulty error handling in Wine but I personally am incapable of confirming it by debugging.

Besiege came out with a pretty big update 2 weeks ago now and it still hasn't landed on GOG yet.

Staxel appears to have fallen out of version parity with the Steam version, CE aside; recent and old threads suggest it'd fallen as far back as October.

So they gave up on the full Staxel. Hah. It did seem rather overwrought.

The 1.10 update of Besiege has been pushed to Galaxy today. Hopefully the offline installers will be updated soon as well.

Succubus,this game has been abandoned by the developers on GoG,the last update it had took a month plus to come here while Steam got it instantly,now Steam has received another one(two weeeks back) and is pretty much the same situation as before,with the chances of it coming here being very low.. As the last one only arrived thanks to the community pushing the developers to relase it here,now is the same as before with the only difference that no one cares.The game is pretty much dead. here.

Oriental Empires got an update on 22 december 2021. Not a big one but one nontheless. I already posted on steam forums where the developer is active (he was online and posting 8 hours ago). We'll see what comes out of it. This one is strange because, if memory serves, Oriental Empires didn't have any big problems with updates (a few days at most).

Besiege has been updated.
Please check.

I'm not sure exactly what happened, but it looks like Syberia: The World Before - Prologue is either one update behind from the Steam version, or the GOG version is named wrongly.

According to this announcement, the version on Steam is 1.1:
https://steamcommunity.com/app/1421230/eventcomments/2992043384039007358/

And according to GOGDB, it is in the version 1.0 here:
https://www.gogdb.org/product/1185739490#builds

But the GOG and Steam builds were released only 5 days apart from each other, and going only by the information in both store pages, they seem to have the same contents.

According to steam changelog - patch contains language update with 6 aditional languages.
Based on this info - versions are identical 'cause GOG version contains this languages (based on info provided on store page).