Great subject! I think I saw a similar one a while ago.

Maya has a very silent and high voice. She only uses it when she feels hungry and leads me to the kitchen to get some goodies

Inka had a very loud & demanding voice! One loud meow from Inka is enough to call all "troops" to the "restaurant"

Zazou says something sounding as "mayw!". She only uses it when she wants a headrub, and when she is in the car. Zazou is very scared of the passing streetlights, so we have to cover the travelbox with a sweater

Snoopy has a real funny high little "Mjow, mow", with or without sound. LOL, mostly she opens her mouth and "sayss" MJOW, she isn't making any sound

I forgat to tell that all cats sometimes sound like little goats, whenever they discover a birdie on the lawn