Just too many variables to draw any real world conclusions. Microphones sound different at various price points and the preamps they are plugged into are just as important. And you have to wonder does the YouTuber even know how to properly operate the equipment. Were the speakers volume matched? How loud are they really playing them. Some speakers can sound great at 80 dB but be dreadful at 90 dB or vice versa.
Given YouTube's bit rates and compression schemes, this is like comparing speakers or electronics while listening over an AM radio. Sure you might hear a difference but how do you know that the clearer, more resolving speaker or amp might be crazy bright in your own living space?
Even those that make available FLAC or wav downloads can't be trusted to account for all the variables involved.
Would you choose a wife based on how she looked on YouTube? I hope not.
