Dice vs quantum random number generator
From the manufacturer's website:


  Quantis uses Quantum Physics to create truly random numbers
  
  Existing randomness sources can be grouped in two classes: software
  solutions, which can only generate pseudo-random bit streams, and
  physical (hardware) sources. Software solutions are not capable of
  providing true randomness as they are based on deterministic computer
  programs. Instead, they rely on external entropy sources to build up
  randomness, but these are slow and inefficient, and the quality of the
  randomness may be difficult to verify.  In the latter – hardware RNGs
  – most random number generators still rely on classical physics to
  produce what looks like a random stream of bits. However, in reality,
  determinism is hidden behind complexity for such RNGs without real
  quantum random properties.


They claim that hardware random number generators which do not use quantum properties are actually deterministic but this determinism is hidden.
This is complete nonsense.

There is no evidence that this is true and no theoretical model supporting it.

Even if the universe was completely deterministic as long as the process generating the output is hidden (as they claim) the output will still appear random for all intents and purposes. Randomness is not necessarily a fact about the universe but about the lack of knowledge of an adversary.

Saying that the universe is completely deterministic but that their quantum random number generator works would require the universe to receive no feedback from quantum effects. If this was true we could also not measure them.