My pal, Fr. Guy Selvester, has a great comparison on his blog of papal vesture last year and this year. Same event (Vespers for the 1st Sunday of Advent), same place (St. Peter's Basilica), same Pontiff, just a different head of the Office of Papal Liturgical Celebrations. Check it out.
By the way, with my diocese deciding to put Catholic radio evangelization on "hiatus", my last episode of Proclaim the Good News had Fr. Guy and I reminiscing about our years of hosting the show. You can listen to that last episode by clicking here.