A 200-sample lv.99 normal-morale test reposted at http://bbs.ngacn.cc/read.php?tid=9071590 show that Mikuma Kai with 2* no.3 gun have 91.2% accuracy and Mogami Kai with 2* no.2 gun have 69.7%. p-vallue for the difference is 1.071*10^(-7) and is significant.
Note that it didn't suggest if no.2 gun have yasen acc bonus or not.
Thanks for taking the time to answer my questions regarding the use of (F)BBs vs CAs in Winter 2016 E3. Just thought I would thank you here instead since you last updated that Winter 2016 blog post pretty long ago.
Thanks for your contributions to the Winter 2016 Event, without your assistance the implementation as well as the updates of new information cannot be effectively done let alone without the necessary manpower.
Will be counting on you in the future for your helpful contributions!