Same premise, girls in military, going to war and does cute things.
Almost same plot, almost same crew. The only difference is that in KanColle, they are historical ships,in contrast to being witches in the StrikeWitches, and of course, in KanColle they have real pants/skirts.
both have similar, VERY SIMILAR main characters. both have superpowers. both have close friends of protagonist that are very similar. identical twin leaders. this is a very hurried version, but they are so similarly awesome it's uncanny