Alinghi has more improvement.
I do think however it was the 57 itself rather than the weight difference that stopped FNR. I think the actual 2kg is the important fact rather than the turnaround between them. FNR raced with no cover and copped interferance at the 500. So i am not writing him off completely. That being said i still think Alingi wins...convinceingly. Odds could be silly on FNR though.