Maybe, but against Barca they played 4-4-2. It was supposed to be a 4-3-1-2 with Stankovic the link between the midfielders and the attack, but in reality the 2 strikers were completely isolated and there was no width whatsoever because they didn't have real wingers, nor there was a link between the robust midfield and the attackers.
Sneijder brings different qualities compared to Stankovic. He can play a good ball that will open up the defense or start a good counter. With Eto'o and Pandev playing more on the wings, Inter also gets width and speed.
This formation is much more promising for counter attack than the one against Barca.
Also, have in mind that it's very hard to win the ball from Barca's midfield, due to the excellent possession and passing game, and start a counter. It should be easier to win it from Chelsea's midfielders.