Database: european_football_2
Question: What is the difference of the average ball control score between Abdou Diallo and Aaron Appindangoye
?
SQL: SELECT CAST(SUM(CASE WHEN t1.player_name = 'Abdou Diallo' THEN t2.ball_control ELSE 0 END) AS REAL) / COUNT(CASE WHEN t1.player_name = 'Abdou Diallo' THEN t2.id ELSE NULL END) - CAST(SUM(CASE WHEN t1.player_name = 'Aaron Appindangoye' THEN t2.ball_control ELSE 0 END) AS REAL) / COUNT(CASE WHEN t1.player_name = 'Aaron Appindangoye' THEN t2.id ELSE NULL END) FROM Player AS t1 INNER JOIN Player_Attributes AS t2 ON t1.player_api_id = t2.player_api_id