Wall is better then IT in every category except scoring. Rebounds, assist, steals, blocks and universally recognized as being a better defender.
People really need to stop this one player scores more so that makes them better narrative. There's more to being a professional basketball player then simply scoring. The people who rate John Wall highly understand this.
The 4 more assist per game (Wall 10, IT 6) can be anything from 8 to 12 points. Those 4 assists make up for the 5 more points IT scores per game over Wall.
The math is simple. 4 assist per game > 5 points.