Probably not different enough that you could pick one from the other without a lot of practice, but depending on what PRNG you use, there's a good chance there'

Probably not different enough that you could pick one from the other without a lot of practice, but depending on what PRNG you use, there's a good chance there's repeating patterns at different frequencies in the lower bits. Take a look at the visualisation bitmaps in https://www.random.org/analysis/ https://www.random.org/analysis/ - I'd guess there's enough structure in that signal to appear in the 'white noise' as an audible whine.