Oh, Thanks God, our discussion again turned into professional level! At the very beginning I said that I compared files MIXED on 32 and 64 bits (files were 16 bit ones). Never tried to claim that I hear the difference between 32 and 64 bits single files.
Cubase has just provided us with more precise tool for MAKING music, not just LISTENING. We can manage without it and make interesting things even on Windows Movie Maker 
but- at professional level- better and more precise tools we have- more chance we get to create a real masterpiece. At the price of 60 Euro (upgrating from 9) and a little more processing power, it is worth to try!