Is it better to take the train or bus to Suzhou from Pudong International Airport?

Hi, the direct long-distance at the airport can be more convenient without any transfer.
From Pudong Airport to Suzhou, buses are scheduled at 10:00, 10:40, 11:10, 11:40, 12:10, 12:40, 13:10, 13:50, 14:20, 14:50, 15:20, 16:10, 16:50, 17:20, 18:10, 18:50, 19:20, 20:00. You can reach Suzhou within 3h.