What's that story in the Old Testament? er, King Solomon or something...
Get the two of them in a room with the guitar... and a bloke with a big axe... (oh yeah, and me)
"The fairest outcome will be if you both get half..."
The one that goes "omigod - don't do that! He can have it, just don't break it..." is the one who should take it home. Simple! :D
Of course, if neither of them say that, then neither of them deserve it...
(that's why I'm in the room, btw :lol:)