I've seen the original Russian version, so I expect this will basically be the same, with some graphical tweaks.
It's like the second one in artifact hunting and blowouts, but more like the first in storyline progression. It does only have 3 areas, which are pretty big. There are a lot of quests in the first two areas, but only plot quests in the last one, iirc, which is a bit of a letdown, but the atmosphere of the last area makes up for it.
The achievement system is really well done here, imo. You get achievements for doing things that are important in the game world, and then you get in-game benefits related to what you did. E.g. you do something big that helps stalkers in a certain area and they reward you with a longterm benefit. The achievements are well integrated into the game world, which really helps with the immersion.
Anomaly zones are marked on the map, which is nice since it makes finding artifacts a lot easier, well if you have a good detector. It is a bit small area and NPC wise. Things aren't on the scale of SoC, but there are some pretty epic moments, especially your journey to the last area. Expect to see some old faces, and see if you can spot Putin, lol.