I know this isn't much of a big deal but I noticed not too long ago. Don't the characters of KNT remind you alot like the characters of Naruto?
You have the main characters Yattarou and Naruto, who are known to be dense and somewhat airheaded. Yattarou doesn't mess things up as much as Naruto does, but he has his fair share of goof ups and sometimes leave their teammates groaning. However, in some of the most daring situations they tend to act very serious and speak in very solumn voices. They never give up no matter what happens. They'll even risk their lives for others.
Then there's Pururun and Sakura, who are kind, gentle, and mostly friendly. However, when you get on their bad side, they won't hesitate to strike back. The boys often make them feel left out at times (intentionally or unintentionally). But overall they are enraged, yet cute in my opinion.
Finally there's Sukashii and Sasuke, who are usually aloof. Has anyone noticed that when they relax, they both tend to lean back on the edges of the counter or bridge. They both keep it cool and they do irate the other two boys to no end. The only differences between them are that while Sukashii is into alot of girls of whom have no interest in him whatsoever, ironically Sasuke has little interest in them while they're in love with him. But they both are cool in their own ways.
This is a rather pointless thread but just thought I'd point out a few interesting facts about the two shows' similarities. If you have any other characters from other anime you like to compare them to, go ahead.