Since my league started using fractional points 2 or 3 years ago, there have been no ties. I know this doesn't help this year, but you may consider it in the future.
I disagree that you should just give the win to the higher seed.
Here are some suggestions to decide the winner:
a foot race between the 2 owners
a chess game
a game of ping pong
E-bay type auction
go to Best Buy and have them both play War Pigs on Guitar Hero, whoever rocks harder wins
rock, paper, scissors
Actually I think coin toss is the fairest way to decide this. Next year, have at least 3 tie breakers!