Knowing kyo's strength is fashion and johnny seems to be gifted in cartooning. To add a bit of Vishness to this contest, I say the object of the contest is to see which person can create a piece of flattering art about their opponent. The better the light it puts the opponent in, the better.
If Johnny wins, kyo writes a NICE paragraph on his DA page complementing him on his artistic ability for all to see.
If kyo wins, Johnny has to... volunteer to clean the heads for a week.