Kefka Palazzo was created in 1994.
No, I don't think they would.
Considering that Kefka became a God, and the Joker is just a normal (yet insane) human, Kefka should pretty easily win. Good question though as they are both crazy clowns. Kefka also managed to destroy an entire world to ascend to godhood. Joker is probably a more interesting character though.
Palazzo Baldassini was created in 1519.
Palazzo Antinori was created in 1469.
Palazzo dell'Arengario was created in 1956.
Palazzo Chigi was created in 1580.
Palazzo Montecitorio was created in 1697.
Palazzo Bianco was created in 1884.
Palazzo dell'Arengo was created in 1745.
Palazzo dell'Antella was created in 1620.
Palazzo Rinaldi was created in 1822.
Palazzo Corsini was created in 1740.