Statsmodel gives many advanced statistical functions which are not present in pandas or numpy. Scikit-learn also has many of the statistical functions, but their functionalities are limited. For advanced operations, statsmodel is the way to go. Review collected by and hosted on G2.com.

It is a relatively new package, the quantity and quality of documentation available is very poor. It is less pythonic than scikit-learn. Review collected by and hosted on G2.com.