His illusion is different from the others...

there are 3 canonical copy cats (im not counting filler like Kevin Smith or Wakato)

Kabaji-Can only Copy who he is playing

Hitouji-(i think thats his name) of Shitenhouji who can copy voices to a T, mimic mannerisms and techniques

Nio-Nio flat out mind rapes you and he can be anyone...now that i think of it maybe his laser is slow because he hits it righthanded as opposed to southpaw...man Nio if fucking awesome, another ambidextrous player, he mimics voice and he chooses specific targets, if Fuji, Seigaku and Atobe and the other weren't invested in Tezuka's greatness the Illusion wouldn't have worked