User blog comment:Tsubakura/Mythbusting the metas of KanColle/@comment-62.77.119.80-20170223105959/@comment-28069733-20170223121952

15.5cm guns do not give you any fit bonuses.

They definitely are a better alternative if you only have access to, but and  are strictly better, because they have far higher  stats and can be upgraded to compensate for the  stats.