Both are strong, but I vote for Itachi.

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It would be close but I say Yumichika-san would win.

Very close!

I'll go for Yumichika, because, as I said on the other one featuring Itachi, I don't know much about him, but I know that Yumichika has an interesting Zanpakuto ability (shhhhh, don't tell Kenpachi, or Ikkaku). XDDD

I think Itachi would win this, he has the superior abilities.

'Cause he's beautiful. XD

Of course Itachi is going to win o.o

This one is still 50/50 O_O

Itachi of course! We've NEVER seen him fight for real. He always holds back when fighting the leaf village, if he really wanted to destroy their village it would be gone in a day. Yumichika has fought seriously once, and he has a pretty shikai, but he's weak and would die easily against... the majority of the ninja from Naruto. Including the weaker chuunin whose names have never been said and die like flies in major battles.

Actually, Yumichika is pretty strong. He was able to beat Hisagi, who is at captain level reiatsu. So he is a powerful opponent and it would be very very close.