Koihime†Musou

Similar on the fact that the names have to do with the other and some of the fight scenes are similar and is a Historical anime 

Both have gender swapped historical figures (in Sengoku Otome they're from the Sengoku Era, while in Koihime Musou they're from the chinese Romance of the Three Kingdoms), an almost all female cast with some random yuri and a bit of ecchi/comedy. Sengoku Otome has more plot though, while Koihime Musou is more like a slice of life than anything. 

Both are filled with mostly only females fighting one another. Though Queens blade is more ecchi than Koihime Musou.  

both are ecchi + warrior girls + pseudo-historical plot. 

Both series are about very badassed chicks who are armed with white weapon and they perfectly know how to use it. Shortly : lots of action and fanservice.  

People from Classic Asian story AS LOLIS! Also, both are funny and have an actual plot. 

The two anime (KH Series) and GF Beta are based on Game. No male MC on anime. Male MC on both mangas. A lot of girls. Yuri subtexts. 

Lots of strong female heroines, specially since almost all the characters in both series have the same names, and i take it are from ancient warriors. 

Both anime feature an entire female cast who are very talented and pretty much bad ass chicks. Koihime Musou however is set in the Sengoku Era i believe and Senran Kagura is set in modern times, and are Shinobi. 

Remakes of Romance of the Three Kingdoms in untraditional way. One is based on eroge and has moe as characters, one is based on Gundam franchise and hase mecha as charaters. 

Koihime Musou is basically the same thing as Sengoku Basara. The few differences are that in Koihime Musou it is all girls and also in Koihime Musou the "special" moves aren't extremely over the top like they are in Basara but still over the top. 

Both main girls have the same hair style and color. Harem, check, fighting, check, lots of girls, check, humor, check, and fan service, check 

Both have quite a bit of fanservice, powerful loli characters, and elements based on The Three Kingdoms. If you enjoyed one, you'll probably enjoy the other. 

Similar on the fact that the names have to do with the other and some of the fight scenes are similar and is a Historical anime and is the second season of Ikki Tousen so of course it would also go here. 

Same historical time period, mostly the same chars. slightly different focus, but the plus side you get to see the moe and the not moe interpretation of history ^_^ 

The same studio. Same character design. In the OVA same school. In the visual novel the main character is from this school 

Similarities: - Centered around the same time period - Have a decent focus on boobs (Hanyuu having more of one) - Mainly girl only cast - Have girl love elements to them - Give off the same atmosphere - Travel from town to town and no two episodes relate much other than to progress their journey's Differences - Size of the traveling party - One main character is praised for her looks and the other is made fun of for them - Koihime incorporates side characters into it's storyline more than Hanyuu