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

how old are you ?

You conflate here and confuse taste in musical choices and what is the concept of musicality ... You confuse a specific music choice with acoustic...

Did i must repeat my post above in one sentence because you dont seem to understand : taste there is yes BUT IT IS NOT ABOUT TASTE ...

I will not go further ... 😊

By the way the fact that i listen almost nobody on your list had no relation with the objective parameters at play for any kind of speakers in a specific room and the optimization process of this speakers/room relation with a specific Ears/brain ...

No matter who is the pianist in a room or through the speakers, acoustic will not change ... Do you get it ?

Incredible.... 😊

Will you repeat your taste mantra with a list of names , with no argument at all only to have the last word, or perhaps you dont even understand this simple distinction between a subjective choice and the objective factors which are at play when we speak about "musicality" ?

The term "musical" cannot be defined as an opinion...

So tell me which/who is more musical:

Megadeath, AC/DC, Waylon Jennings, Pink Floyd, Cowboy Junkies, Maria Muldaur, Led Zeppelin, Suzanne Vega, Knickelback, Warren Zevon, Fritz Reiner and the Chigago Symphony Orchestra, Taylor Swift, The Moody Blues Threshold of A Dream LP, The Moody Blues Days Of The Future Past SACD, Ten Inch Nails performing "Hurt", Johnny Cash covering "Hurt", Johnny Paycheck, Linda Ronstadt with The Stone Ponys, Linda Ronstadt without the Stone Ponys, Diana Krall covering "Desperado, Linda Ronstadt covering "Desperado", Catie Curtis, Charlie Manson’s "Charlie’s Good Time Gospel Hour", Johnny Cash "Live at San Quentin", Johnny Cash’s in studio recording of "Ring Of Fire", The Beach Boys, Willie Nelson with The Highway Men, Willie Nelson solo, Taylor Swift, Lynyrd Skynyrd’s first LP, Lynyrd Skynyrd’s second LP, or Bread?

"musicality" is a concept defined with parameters under controls in experiments analysing statistical set of subjective perceptions classed in different categories..

After this set of experiments, we can using various concepts pertaining to acoustics have an idea about what will be experienced as musical by most people and what will not be so perceived ...

But this, and what followed it, was all stream of consciousness gobble-de-gook.  

. . . Mirriam Webster lists

What people choose to play on that equipment is a different matter- some of which some people might regard as musical while others might not.

So the topic, IMO, is bit too broad in the context of this thread.

Exactly and again, exactly. I guess opinion and taste might enter into it?