Mezzo soprano 363 mm. scale isn't a Concert uke.
It's sort of beefy soprano.
Body 110 % mesurations of Matin SO (note: not the soundhole at this ratio).
13 th fret joining.
Generaly, 12th for a soprano 347 mm. scale.
So, playing technic is like on soprano.
Just a little more room, but still soprano soul.
Some playing one of my mezzo's have a feeling about a realy comfy soprano.
If you have soprano spirit, 363 mm. scale mezzo is like at home.
Not a 383 mm. scale concert.
And soprano, mine I say,
have more sustain, little more but more than my soprano,
with same wood and building way.
Hope this answer give you a little more light.
And sorry for my poor english
and appologies for language mistakes...
what's the difference between this and a concert uke?