The first major difference is in the composition of the choir. Here, we have females singing the soprano and alto parts, while in the Renaissance, most choirs were composed of boys who would sing all parts.
Though dynamics were rarely indicated back then, the choir seems to have a great sense of dynamics especially in their sequences. (0:28-0:32) As they repeatedly sing “sing joyfully”, their singing becomes more forceful and intentional, as if they are giving importance to those few measures.
Pitch was not standardized back then. Though this may be considered nitpicking, there are many keys in which this is sung. Some recordings are in EbM, this one is in EM.
Improvisation was rarely used in this interpretation, most especially at cadences, where it was usually found and used.
The tempo was moderate, and the music had a very strong sense of up-down. The duple feel was very eminent and strong.
The Original Grooves 