  It is demonstrated on a realistic model of amorphous alloy
Si$_{0.9}$Ge$_{0.1}$ with 1000 atoms, that short-range spectral fluctuations of
propagons and diffusons are universal and in agreement with random matrix
theory. The universality ceases at distances greater than Thouless number
$N_T$, where propagons obey the Altshuler-Shklovskii power law, $\Sigma_2\sim
N^{3/2}$ for the variance $\Sigma_2$ of the number of levels $N$, while a new
power law, $\Sigma_2\sim N$, is observed for diffusons.
