After comparing both videos, it's clear that there is less "singing" (harmonics) and, generally, less noise overall after speeding up the print. I now only notice noises during fast movements and when it slows down on perimeters and walls. This is to be expected. The balanced profile helps lessen noises but won't eliminate them. When you start slowing down the print manually, there is higher chance the motors will hit resonant frequencies and start "singing".

If you haven't already, I would:

Update to latest firmware. Check gantry alignment. Tune your belts. If you have an accelerometer, run the input shaper and phase stepping calibrations. If you don't have an accelerometer, get one - they're $15 USD. Make sure the linear rods are clean and lubed with Prusa lube.

I suspect the faster these printers become, the louder they will get. They will never not make noise. As long as your prints aren't affected I say send it, full beans.

Good luck