On a digital piano, is there a signifanct(noticeable) difference between 32 bit and 64 bit polyphony?

Is the difference between 32 and 64 bit noticeable? Does 64 bit sound more like a real piano when compared to 32-bit. I am a beginner and thinking of buying my first digital piano. The piano I liked(Yamaha YPG625) only has 32-bit. Please advise.

Is there any song that can be played only with 64 bit and not 32 bit?
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