I agree that I fail to see any similarity, but I believe there are a few between the other Motochika and myself. Enough that I'll take his word for it when he names his companion as Mitsuhide.

[Please don't make him tell you about the time Mitsuhide brought up that nickname. It was part of what convinced him that he was indeed dealing with people from some strange alternate world, but Mitsunari really doesn't need to know about it.]