Vibrations can be problematic in multi drive chassis. The more NAS rated drives are apparently rated specifically to deal better with vibrations and of course the NAS itself some isolate drives far better than others from each other.

It might seem minor, but just watch this rather old now but infamous video of Brendan Gregg shouting at HDDs causing significant drops in throughput: https://www.youtube.com/watch?v=tDacjrSCeq4