Kana has a net, but Motaro doesn't (maybe some other abilities too). and Motaro's attacks are better, in my opinion. he can grab, like Goro, and beat you up until half your health is gone. + he moves faster
Motaro is harder to kill, but almost any character can do it (if you use my tactic), while Kana is easier, but you can't do it with just any character, because you need to know the abilities, and I don't know them all. that's it. and no one will help, maybe.