None. You will notice no change. Twenty-four bit depth is useful for mixing and mastering, but not for playback, as humans have a dynamic range envelope spanning ~80dB at any given time. Sixteen bit is capable of 97dB. You cannot hear everything a redbook CD is capable of holding. And, the loudness wars have compressed recordings into ever lower dynamic range envelopes.
Similarly, 44.1KHz sampling rate is beyond what humans can hear. Most of the content above 24KHz is actually noise that was pushed out of the range of human hearing.
There are great quantities of research explaining both of the above points, and
@amirm has produced some nice videos exploring the contents of these files to demonstrate whether they are worth the cost (they are not).
Also, if you study the test results on this site, you will soon discover a great many consumer products, especially amps, cannot reproduce even 16 bits dynamic range. Why feed it 24 bits, when it can only play 14?
What you may hear, if you have truly golden ears, is aliasing or other artifacts from the resampling algorithm used in the product. This is mostly a solved problem by now, but it does still refuse to die in some instances.
My money is on a Denon AVR with the amps turned off. You get a solid product with better objective performance and a decent warranty that is a known quantity and probably less buggy than any given Emotiva. You also get Audyssey XT32.