I found some interesting colored engravings showing the different habits of priests worn in the Order of Malta.
Conventual chaplain in minor daily habit
Conventual chaplain in grand daily habit
Conventual chaplain in minor choir habit
Conventual chaplain in grand choir habit
Prior of St. Jran with grand (no kiddin') cross of the Order
Bishop with grand cross of the Order
[Update: Alright! Reliable Ed informs us about the background of the pictures: "The drawings are shown in the Knight's church of St. John in Malta. This was their headquarters until they were driven out by Napoleon. The church contains the tombs of the Grandmasters of the Knights of Malta, several of them were also cardinals. The use of the church was recently returned to the knights."