Three differences between medieval and renaissance art were that most of medieval art was more allegorical and linked to the divine world and its possibilities towards humanity. Medieval art was also often concerned to represent heavenly and apocalyptic sceneries. Their paintings were flat, with little sense of depth.
The Renaissance art focused more attention to the human body and detail. They taught through the realistic perspective, shading, lighting, and proportions. Renaissance art celebrated man's intelligence to build and construct and to be the cause for a possibly good life.
I hope this was enough.
