rng.equal compares the RNG settings associated
  with two objects.
rng1.equal tests whether two objects have
  identical initial RNG settings.
rng.equal(x, y) rng1.equal(x, y)
rng.equal and rng.equal1 return a
  TRUE or FALSE.
These functions return TRUE if the RNG settings
  are identical, and FALSE otherwise. The comparison
  is made between the hashes returned by RNGdigest.