совсем другое(No, it's a whole different ball game. • I know you think you're some hotshot just because you worked in television once, but working on a film is a whole new ball game. • I used to race dirtbikes and ATVs quite often but sportbikes are a whole different ball game.4uzhoj)
дело(в составе выражения "совсем другое дело": It's one thing to babysit your friends' kids from time to time, but having your own children is a whole new ball game.baletnica)
заткнуть за пояс(Miley Cyrus has taken a wrecking ball to her rivals after her number one hit was named the most sung song of the year by a karaoke website. Ballistic)