Cardiff, they will be distracted by the carling cup final and will have their heads inflated and wont think they have to work as hard
On balance, I'd prefer Palace to snatch it after a hard-fought tie. As evolution says, Cardiff might be feeling down if they lose and we don't want them coming into Tuesday's game on a winning note.
As much as I would prefer Palace a lot more, I think it would be better for Saints if Cardiff took this...