4.362 out of 5 from 186 votes
Both series revolve around a guy and his super loyal female automata. The series aren't mighty similar, but both feature a steampunk-style gynoid. Odds are, you might like one if you liked another, though I'm afraid I can't think of more reasons why.
Both series take place in magical school. In both the male lead is underestimated by most of the other students, but the truth is he is actually very strong. In both series he also has a devoted yandere (or close) following him around. Mahouka Koukou no Rettousei is definitelly better than Kikou Shoujo wa Kizutsukanai, but if you liked one, the other should still prove interesting.
Both series take place in some multinational magic school, in both students are ranked by strength and fight each other using proxies (mechanical dolls in case of Kikou Shoujo wa Kizutsukanai and summoned creatures in Tora Kiss). Last but not least, in both series the protagonist is ranked last (or close to last), but is actually extremely powerful. If you read one and want to read something similar the other one should be up right your allay.
P.S. Please note that Tora Kiss contains quite a bit of ecchi content.