Don’t own either.
But it makes sense for the smaller L3P to be quieter as there’s less mass to resist bass. They’d have to reduce max sound to make them less distorted.
Just remember what sound is, an alternating air movement, you can see it physically with a speaker which is waterproof.
If you want loud, you need a physically larger speaker, i.e. over-ear.
However, human perception is adaptive, in the same way your eyes can see in darker over time, ears can hear quieter sounds when it is quieter, so the ears adapt. If you listen to louder sounds you temporarily dull your hearing, and if you do it often enough that damage becomes permanent. So if you see louder sound you’ll just spend later life saying “what?” but not even know why.