I’m just going to chime in a bit because I’m currently only playing Helldivers 2 out of the two games.
Some have discussed Darktide, and what draws people in is the Warhammer 40K setting.
I’d like to continue my personal opinion in that discussion by saying that if someone made a game with Helldivers 2’s gameplay: open map, main and side map objectives, hidden bunkers and caches, the ability to call in stratagems, and soon, Mechs.
That would have been the ideal Warhammer 40K game for me, with proper licensing allowing me to fight from the trenches as a Krieg soldier on an open battlefield in PVE and in a third person perspective (no mods).
Darktide is fantastic, and I have enjoyed it for 1500 hours, but where does it go from here? How will the gameplay in Darktide evolve? I can’t really see anything on the horizon other than more Auric Maelstrom or maybe “Chaos Wastes”, where the A.I Director is throwing hundreds of enemies at you.
I’d like to see Darktide shake up its formula and evolve from where it is now, and hopefully it will in the future, but the linear maps detract significantly from the game’s enjoyment.
Helldivers 2 excels in that it is strategic in terms of how you use the stratagems, chase map objectives (RNG generated map) either alone or with 2-4 people while the others split in different directions, whereas Darktide focuses on forcing you to stick together and blitz 1000mph gameplay, there’s really no strategy, just reaction-based gameplay by the game constantly throwing braindead enemies at you.
However, the gameplay in Helldivers 2 feels much more intense to me (the new Autonom civilian rescue mission is terrifying in diff 8-9), whereas Darktide is more exhausting to play because it requires constant hyperfocus from you, where one misstep kills you.
Whereas Helldivers 2 is more about planning ahead, packing the right loadout, and sometimes sneaking past fights, Darktide is all about main character syndrome, in which you feel like a super hero and kill enemies by the hundreds during a match.
There are advantages and disadvantages to both approaches. All I know is that, as I previously stated, if a Warhammer 40K shooter with Helldivers 2 gameplay was created, it would be my main game for years to come.