Stylish Nero
We Dem Boys!!
But that's more of a coincidence than anything. Itsuno took Dante's red coloring from the Power Rangers (Super Sentai), like he did with Viewtiful Joe and his white hair is due to Japanese mythology. It is also a custom in Japan (like in most other countries) that the eldest son would inherit the father's possession, including his sword. In DMC 1, Sparda used Yamato, so it made sense that Vergil would inherit and use it. If I can remember, it was the same with Inuyasha's father and how Sesshomaru would inherit his sword and how Sesshomaru/Vergil wants to surpass his old man and obtain his sword because their dad is legend while Dante/Inuyasha don't really care.
For DMC 1 specifically, it doesn't really have many similarities with Inuyasha. Outside of the fact that both are about red color wearing, white- haired demon half- breeds who fight against other demons, who is the son of a legendary demon there really aren't any similarites.
Really, saying that DMC is similar to Inuyasha is like saying that Iron Man is similar to Batman. Yes, the two similarities, but that doesn't really mean anything. Saying that DMC is similar to Blade, however, actually gives rise to thinking that maybe there might be some inspiration there.
Pretty huge coincidence if you ask me.