The paper presents transport code simulations of sawteething discharges in T-10. Two models were employed to describe the sawtooth oscillations. In the first (reconnection) model the sawtooth collapse is caused by complete reconnection. In the second (turbulent) model the collapse is ascribed to increased radial transport caused by the generation of turbulence at some critical size of the m = 1, n = 1 magnetic island. For one particular discharge the predictions of the two models for the temperature, density and current profiles as well as the evolution of the heat pulse generated by the sawtooth collapse were analysed in detail and compared with the experiment. Also the influence of both central and off-axis heating by electron cyclotron waves on the sawtooth dynamics as given by the two models was investigated and compared with the experiment. In all respects good agreement with the experiment was obtained with the turbulent model. In contrast, it was not possible to obtain satisfactory simulations with the reconnection model. The failure of the reconnection model is mainly due to the general properties of the reconnection process and, consequently, is not characteristic of the specific model employed but applies to all models ascribing the sawtooth collapse to reconnection.