Impossible to answer as they are two different vocal ranges.
Each voice must be judged individually. The difference between a spinto and a mezzo would not lie as much in the notes that can be...
A mezzo soprano has a wider range of notes then a regular soprano. They can usually reach higher notes and lower notes then a normal soprano.
Hopefully, any trained voice will be able to do...
I think that mezzo-sopranos slightly have heavier and darker tones than first sopranos. First sopranos usually have high-pitched, squeaky singing voices. Sopranos are more comfortable in their higher...
Yes, the soprano is the highest voice range, with the exception of a soprano who can sing higher than a C#6, in which she(he?) is known as a sporanino.