Board Thread:Questions and Answers/@comment-26303790-20160823051143/@comment-10733658-20160823052748

Well, Arima's personal involvement is probably part of it. But the bigger piece is probably the difference in their interactions with the CCG.

Kaneki intentionally avoided killing or seriously injuring Investigators in all his encounters with them, and was not tied to any predatory incidents.

In contrast, Takizawa has personally wiped out multiple squads. Ghouls that target and kill Investigators are high-priority targets, and he's been involved in the killing of two Associate Special classes that we've seen. He's probably killed a lot more off-screen, in the year since the Auction.

So it's a matter of one trying to avoid conflict and killing, in comparison to the other actively seeking it out.