As I see it, Sengoku looks in a more advanced state than CK2, for example in graphics. The portraits in CK2 still have, apparently, one single font when the portraits in Sengoku have dozens of fonts as I see in the screenshots. The map looks more polished than the one of CK. I don't know if you plan to release this before CK2 and you need to put more work on this but it looks to me that Sengoku is getting more attention than CK.
No, CKII is the big enchilada. But Sengoku is closer to release.
You, the Paradox team, post in this forum much more than in the CK one
Well, that's because I'm on this team...
No Paradox 'regulars' are working on CK2, so seems obvious.
There's no such division. The number of years with Paradox that Besuchov, Birken and me have compared to Doomdark, Tegus and SolSara are fairly equal, and Yonaz and Aerie work on both projects.