Ecchi na Oneechan ni Shiboraretai

Both are incest hentais involving sisters, even the title is almost identical, although because of the title you may noticed that the main difference is that one is little sister (Imouto) while the other one big sister (Onee-chan), but besides that even in animation, character design and what else is similar thanks to the same producing company. 

both MC in both hentai have older sisters with similar traits in which the mc sisters have unconditional love for for the MC...if you like one then I highly recommend you watching the other as you'll enjoy it greatly 

Megumi, one of the girls in Ecchi Na Onee-chan Ni Shiboraretai, is the slutty gyaru type of girl, there's not much in the part of sluttiness, since that hentai is centered on incest, so if you want to watch similar kind of girls in full slut display JK Bitch Ni Shiboraretai is a great option, it's still mostly vanilla since it's just one guy that wins over the the female cast because he cums gallons and as you can see by the cover Megumi and Yariko are very similar with that same hairstyle, so if that wasn't enough, both are made by the same studio. There. read more 

There's slutty girls in both with also at least one being the gyaru type, besides that both have lovey dovey incest sex between siblings, Energy Kyouka!! Has little sister and Ecchi na Onne-chan is as the title implies big sister, this last one's focus is entirely on the wincest, while Energy Kyouka!! Is more on the slutty side, but both are enjoyable. 

Both OVAs involve sexual relationships between siblings, three exactly, two big sisters and one brother in both cases, with lots lovey-dovey greatness in both. 

They are both hentais with the exact same concept about a little brother getting home after a while and finding his big sisters more lewd and developed in the areas where it counts, then doing the dirty with them, there's more girls than two in Baku Ane, but since they want to make you buy the visual novel, only two participate in the action, exactly the same number as in Ecchi Na Onee-chan Ni Shiboraretai, since it's the same concept they also have most of the sub-genres similar. They're both good incest hentai. 

Ecchi onee-chans greet their little brother who has been gone for a while, they find him a lot more attractive and the hormones are at full display so they end up banging, that's exactly what happens in both of these hentais, wincest between siblings, plus both are made by goat T-Rex so the visuals and animation are alike (topnotch), even the title of both is similar, go watch them.