The function $f$ is a quadratic function. In the xy-plane, the graph of $y=f\left(x\right)$ has a vertex at $\left(1,9\right)$ and passes through the points $\left(2,33\right)$ and $\left(-1,105\right)$. What is the value of $f\left(-2\right)-f\left(0\right)$?