I could hear both and they are both the same*(see edit below). Try listening with some good headphones.
There is a big difference in these two. The Sonys are made for critical listening.



My hearing goes from about 30Hz up to somewhere just above 12kHz. 30Hz sounds like a cat purring and doesn't come together as a single tone until about 41Hz.

30 and 41Hz are roughly the frequencies of the lowest two strings on a 5-string bass guitar. Interestingly, the sound that we associate with a bass guitar is mostly the harmonics and not the fundamental frequencys.

*edit: apparently, the sound in the videos that you posted is somewhere above 17kHz, so whatever I was hearing was some other unintended noise in the videos.

[This message has been edited by williegoat (edited 04-19-2019).]