In reply to Jiwei He.

The documentation gives the formulas for the parameter estimates. For many statistics, the formulas for are symmetric in the frequencies and weights. However, the sample size is the sum of the frequencies, so any statistics that use the sample size or degrees of freedom will be different. For example, the Schwarz criterion (SC) and the Average Squared Error uses the sample size. Use the GOF option on the MODEL statement and inspect the Model Fit Statistics table for each model.