What is meant exactly by the description 'more musical'?

Lots of conflicting points. I always try to go the simpler route. +1 @erik_squires  "emotionally engaging vs. analytical and accurate".

Try this on for size:

"musical, musicality A personal judgment as to the degree to which reproduced sound resembles live music. Real musical sound is both accurate and euphonic, consonant and dissonant."

Sounds Like? An Audio Glossary Glossary: A | Stereophile.com

Good stuff! That is my interpretation.

If only we could post some notes and a key this thread might even seem musical!

Great dynamic range, lively and detailed, without any harshness or sibilance.

Shooting from the hip here...

Many great posts above that provide great descriptions.

My favorite is "The fact that a Stradivarius sound is better than a cheap violin is a matter of design knowledge about sound experience first not a matter of taste"

The wood is also a major factor in the sound of that violin.

To my ears, musical means how an instrument is reproduced such as piano or the saxophone.  Does it sound like the real thing and many people have their own interpretations of what is real to them.  Many people hear differently and recordings vary widely so that is a big factor.  I want to hear the hammer hit the strings in a piano (the detail) and then I want to hear the wood enclosure of the piano influence the actual note (the tone).  That is my personal preference and what I listen for.  My ears can always hear what I prefer in any system but not every person I know hears the same way.  I can only show them what I hear when I can compare their equipment to what I own.  Then they can hear what I hear.  At that point, it is up to them to decide what they prefer with their own ears.  Some people may call this this "real".  I can agree to that but it is also just my preference.  I call that the beauty of the sound or musical.

Hope this explanation was helpful.

Happy listening.