In AC 2T, there will be four berths in each bay, two on either side. In the case of 3T, it would be three berths with a fold-able middle berth on either side. Naturally, in AC 2T, the space available for each person is higher and journey would be more comfortable. One can sleep or sit at his will and pleasure. But in the case of AC3T, it requires at least two persons mutual consent to use the berth either as a seat or berth. The side berths in both the classes are similar with not much of a difference, except in the case of AC 2T with the help of hanging screens you can have privacy.