I have researched both Kyrie (monophonic) and Kyrie from the Pope Marcellus Mass and used slides and notes from class to learn about their connection to Texture, Timbre, and Dynamics.
First, texture refers to how different parts of music fit in together. Monophony can describe the texture of a single musical line being used without the accompaniment of other musical parts. Monophony is used in kyrie (monophonic) because there is one lead singer without other noises and parts of music. On the other hand Kyrie from the Pope Marcellus Mass uses Polyphony as its texture. This piece of music includes several voices which change the sound of the music and adds layers. These two pieces of music contrast in the way they sound because of the layers of voices, and different pitches used.
Timbre refers to what makes an instrument unique in terms of its sound and colors. In these two pieces of music, neither have instrumental backgrounds. This emphasizes the voices of the singers as well as the pitches and volumes they use. This makes this music unique, and more simple compared to pieces of music with lots of instrumental layers and emphasis.
Dynamics consider the volume of a note or point in music. Kyrie is monophonic and keeps mainly the same low pitch and medium volume throughout the entire piece. This keeps the music simple and recognizable. On the other hand, Kyrie from the Pope Marcellus Mass has two voices in which are both much higher pitched than the prior piece of music. Also, in this piece the pitches slightly change from high to slightly lower, not keeping one simple note throughout the song. Also, the volume in which they perform this piece is much higher.
I thought it was interesting that you said since there was no instrumental background it makes the music unique because there is more emphasis on the voice rather than the instruments. This is an interesting way to look at a piece of music without any accompaniment and only vocalist.