If by loudness one means loud without distorting then they are the same thing assuming a reasonable noise floor. Loud and distorting is different because the distortion tends to make music sound both louder than it is and unpleasant in a way that signals it is too loud.
“Dynamic” is often used to describe speakers with drivers of sufficient size to accurately follow loud musical transients but it would be technically more accurate to describe small speakers as “undynamic” which obviously wouldn’t help the marketing of small speakers.
If by loudness one means loud without distorting then they are the same thing assuming a reasonable noise floor. Loud and distorting is different because the distortion tends to make music sound both louder than it is and unpleasant in a way that signals it is too loud.
“Dynamic” is often used to describe speakers with drivers of sufficient size to accurately follow loud musical transients but it would be technically more accurate to describe small speakers as “undynamic” which obviously wouldn’t help the marketing of small speakers.
By loud, I mean overly compressed, like how most remasters of older songs sound.
Thanks that makes more sense as a question. A clash of terminology that I probably should have been able to work out with a bit more thought.