They're technically coworkers who happen to be friends or at least friendly since they attend the same events (hence the group chat). And they react a lot to the same time-sensitive events (community SP votes, anniversary, pack releases, new game releases, CC packs). And sometimes their de facto boss asks them to make a specific type of video (uninstalling packs, 20yr flashback, new pack reviews, pre-release events like the acceptance letter).
Around all that, they have their own videos. James has his LP along with his other channel with non-Sims stuff, Deli did her LPs and is now focusing on her new puppy, Plumbella did a bunch of flashback old Sims games videos, Lilsimsie does builds and build challenges. Sometimes there might be overlap, other times there's not.
If you're only watching 4 Simtubers, you'll get bored easily. Maybe venture out to others, these four aren't the only ones out there. (EnglishSimmer, Vixella, Aveline, Dr Ashley, Marmelad, Ms Gryphi, Claire Siobhan, and many many more, just throwing out the ones that came to mind) Variety is the spice of life ;)
