Difference between crate-demo.pth and model_best.pth.tar (from CRATE-base)

Thanks for the great work! 

I noticed there is model size difference ~300MB (crate-demo.pth) vs. ~100MB (re-trained model_best.pth.tar).

Because I retrained the model using the repo code here but the results are different compared with crate-demo.pth, much worse. Just wondering what I am missing here.

Thanks.  