Unless differences are really significant, it's actually very hard for most people to spot the differences between recordings made on different devices, assuming levels are matched and the same mics etc are used. In the good old days, when recording classical CDs I would sometimes use short sections from MiniDisc inserted into the DAT material. The reviewers never noticed anything amiss - they were usually complimentary about the sound overall. But to read some people's scathing opinions of MiniDisc sound, you would have thought it would stand out like a sore thumb. (I used MD as a backup medium, and its pre-record ability was sometimes very handy when something unexpected happened in the sessions).
Of course with these 32 bit float recorders, a comparison could be made of apparently over-cooked recordings in 24 bits and 32 bit float, and there the difference would be very evident - horrible digital distortion vs nicely normalised pristine audio.