Hi VenkatramanMarathi,
You can pick up any SPICE model from the list you´ve accessed in MOSIS website. There you found several models that correspond to several runs of fabrication. For each run, the electric parameters are a little bit modified (Threshold voltage, mobility, and so on…)
Which one is more correct?! Every models are correct. In the next run, certainly, the SPICE parameters will be slightly different.
You use one of them to have an estimation of performance of your circuit. To finish your design flow, it would be nice to find statistical data from the 0.35 um TSMC technology. Therefore, you can predict how the fabrication process will affect your circuit.
Regards,