what are some comparisons between medieval music and Renaissance music?

Answer 1

Medieval begins with the fall of the roman empire 476 and lasts until 1400 (roughly). The Renaissance 1400-1600.

I suggest you take a look and the two following sources and draw your own conclusions.

Answer 2

For most intents and purposes, medieval = Renaissance. In music, the only real distinction between the two is medieval music encompasses more Gregorian chant, and Renaissance music starts getting into madrigals and two voice counterpoint.